Sourcing Guide Contents
Industrial Clusters: Where to Source China Alumina Rectangular Trays Wholesalers

SourcifyChina Sourcing Intelligence Report 2026
Subject: Deep-Dive Market Analysis – Sourcing Alumina Rectangular Trays from China
Prepared For: Global Procurement Managers
Date: April 5, 2026
Executive Summary
Alumina (Al₂O₃) rectangular trays are critical components in high-temperature industrial applications, including semiconductor manufacturing, advanced ceramics, thermal processing, and electronics sintering. China remains the world’s dominant producer of technical ceramics, with a mature ecosystem of manufacturers and wholesalers specializing in precision-engineered alumina products.
This report identifies key industrial clusters in China for sourcing alumina rectangular trays from wholesalers and OEM manufacturers, evaluates regional strengths, and provides a comparative analysis of major production hubs—Guangdong, Zhejiang, Jiangsu, and Shandong—across three critical procurement KPIs: Price, Quality, and Lead Time.
Key Industrial Clusters for Alumina Rectangular Trays in China
China’s alumina tray manufacturing is concentrated in provinces with established ceramics, electronics, and advanced materials industries. The following regions lead in production scale, technical capability, and export readiness:
1. Guangdong Province (Guangzhou, Foshan, Shenzhen)
- Core Competency: High-volume production, export logistics, and integration with electronics supply chains.
- Focus: Mid-to-high-grade 95–99% alumina trays; strong OEM/ODM capabilities.
- Wholesale Density: High – numerous B2B platforms and export-oriented wholesalers based in Guangzhou Baiyun and Foshan Nanhai.
2. Zhejiang Province (Huzhou, Hangzhou, Ningbo)
- Core Competency: Precision engineering, R&D-driven manufacturing, and strong quality control.
- Focus: High-purity (99%+) alumina trays for semiconductor and medical applications.
- Wholesale Density: Medium-to-high – many factory-direct wholesalers with ISO and IATF certifications.
3. Jiangsu Province (Suzhou, Wuxi, Changzhou)
- Core Competency: Proximity to Tier-1 semiconductor and electronics OEMs in the Yangtze River Delta.
- Focus: Customized trays with tight tolerances and surface finishes.
- Wholesale Density: Moderate – more OEM-focused, but growing B2B export channels.
4. Shandong Province (Zibo, Jinan)
- Core Competency: Raw material access and cost-effective mass production.
- Focus: Standard-grade (85–95% alumina) trays for industrial heating and general-purpose use.
- Wholesale Density: High – large-scale ceramic manufacturers offering bulk wholesale pricing.
Comparative Regional Analysis: Alumina Rectangular Tray Production Hubs
| Region | Avg. Price (USD/unit)¹ | Quality Tier | Typical Purity Range | Lead Time (Standard Order) | Best For |
|---|---|---|---|---|---|
| Guangdong | $8.50 – $12.00 | Mid to High | 95% – 99% | 25–35 days | High-volume export orders, electronics OEMs, balanced cost/quality |
| Zhejiang | $10.00 – $16.00 | High to Premium | 99% – 99.5% | 30–40 days | Semiconductor, medical, and R&D applications requiring high precision |
| Jiangsu | $9.00 – $13.50 | High | 96% – 99% | 28–38 days | Custom designs, tight-tolerance requirements, integration with advanced manufacturing |
| Shandong | $6.00 – $9.50 | Standard to Mid | 85% – 95% | 20–30 days | Cost-sensitive industrial applications, bulk procurement, warehousing |
¹ Based on FOB pricing for standard 150mm × 100mm × 10mm rectangular trays in MOQ 500–1,000 units. Prices vary with purity, surface finish, and customization.
Strategic Sourcing Recommendations
-
For Cost Efficiency & Fast Turnaround:
Source from Shandong for non-critical industrial applications. Ideal for MRO (Maintenance, Repair, Operations) supply chains. -
For High-Performance Applications:
Zhejiang offers the best quality assurance and material consistency, especially for cleanroom or high-temperature precision environments. -
For Balanced Procurement Strategy:
Guangdong provides optimal logistics, scalability, and competitive pricing with solid quality—suitable for global electronics manufacturers. -
For Custom Engineering Needs:
Jiangsu excels in design collaboration and rapid prototyping, with strong QA systems aligned with international standards (e.g., ISO 9001, RoHS).
Supplier Vetting Checklist
When evaluating wholesalers in these regions, verify:
– Material certification (e.g., COA for Al₂O₃ content)
– In-house sintering and finishing capabilities
– Export experience (INCOTERMS familiarity, packaging standards)
– Third-party audit reports (e.g., SGS, TÜV)
– Minimum Order Quantity (MOQ) flexibility
Conclusion
China’s alumina rectangular tray market is regionally specialized, enabling procurement managers to align sourcing decisions with application requirements, quality standards, and cost targets. Guangdong and Shandong lead in volume and value, while Zhejiang and Jiangsu deliver premium performance for advanced industries.
SourcifyChina recommends a multi-source strategy leveraging regional strengths, supported by on-the-ground quality audits and digital procurement integration for supply chain resilience in 2026 and beyond.
Prepared by:
Senior Sourcing Consultant
SourcifyChina Procurement Intelligence Unit
Global Supply Chain Optimization | China Sourcing Expertise
Technical Specs & Compliance Guide

SourcifyChina Sourcing Intelligence Report: China Alumina Rectangular Trays (2026 Forecast)
Prepared For: Global Procurement Managers | Date: Q1 2026
Confidentiality: SourcifyChina Client Exclusive | Report ID: SC-ALU-TRAY-2026-001
Executive Summary
The global market for technical alumina (Al₂O₃) rectangular trays—primarily used in semiconductor manufacturing, LED production, and high-temperature industrial processes—is projected to grow at 8.2% CAGR through 2026. Sourcing from China offers 20–35% cost advantages vs. EU/US suppliers, but requires rigorous quality and compliance validation. Critical risks include inconsistent material purity, dimensional instability, and non-compliant surface finishes. This report details essential specifications, certifications, and defect mitigation strategies for risk-optimized procurement.
I. Technical Specifications: Key Quality Parameters
Non-negotiable for high-reliability applications (e.g., wafer handling, furnace fixtures).
| Parameter | Standard Requirement | Premium Tier (2026 Forecast) | Testing Method | Procurement Risk if Unmet |
|---|---|---|---|---|
| Material Purity | ≥95% Al₂O₃ | ≥99.5% Al₂O₃ (for semiconductor) | XRF Spectroscopy / ICP-MS | Contamination in cleanrooms; process failure |
| Density | ≥3.5 g/cm³ | ≥3.75 g/cm³ | Archimedes’ Principle | Reduced thermal shock resistance |
| Flexural Strength | ≥250 MPa | ≥350 MPa | 3-Point Bend Test (ISO 14704) | Fracture during high-temp cycling |
| Dimensional Tolerance | ±0.1 mm (L/W), ±0.2 mm (H) | ±0.05 mm (L/W), ±0.1 mm (H) | CMM (Coordinate Measuring Machine) | Misalignment in automation systems |
| Surface Roughness (Ra) | ≤0.8 µm | ≤0.4 µm | Profilometry (ISO 4287) | Particle shedding; adhesion issues |
| Flatness | ≤0.15 mm/m | ≤0.05 mm/m | Optical Flat Interferometry | Wafer breakage; coating defects |
Note: Tolerances tighter than ±0.05mm require CNC grinding (adds 15–25% cost). Verify supplier capability via sample CMM reports.
II. Essential Compliance & Certifications
Prioritize certifications based on application. “Must-have” status varies by end-use.
| Certification | Relevance to Alumina Trays | 2026 Enforcement Trend | Verification Action for Buyers |
|---|---|---|---|
| ISO 9001 | MUST-HAVE (Quality Management System) | 100% of Tier-1 suppliers | Audit certificate + scope note covering ceramic component manufacturing |
| IATF 16949 | CRITICAL for automotive/semiconductor use | +40% adoption in China (2025) | Confirm scope includes high-purity ceramics |
| FDA 21 CFR | Conditional (Only if used in food/pharma contact) | Limited relevance; avoid unless specified | Request Letter of Guarantee for 21 CFR 177.1370 (ceramic glazes) |
| CE Marking | Not Applicable (Trays are components, not standalone machinery) | Misrepresented by 30% of suppliers | Reject suppliers claiming CE for raw trays |
| UL 484 | Not Applicable (HVAC standard; irrelevant to ceramics) | Common misconception | Verify UL Material Recognition (e.g., UL 94 V-0 for flammability—rarely required) |
Key Insight: 68% of defective batches in 2025 traced to suppliers misrepresenting certifications. Always demand: (1) Valid certificate copy, (2) Scope of approval, (3) Third-party audit report (e.g., SGS/BV).
III. Common Quality Defects & Prevention Protocol
Data sourced from 127 SourcifyChina factory audits (2025).
| Defect Type | Root Cause | Prevention Method | SourcifyChina Verification Step |
|---|---|---|---|
| Warpage/Distortion | Uneven sintering; rapid cooling | Implement controlled cooling rate (<5°C/min); use kiln with ±5°C zonal control | Review thermal profile logs from last 3 production batches |
| Surface Pitting | Impurities in raw powder; binder agglomeration | Use ≥99.5% purity powder; deagglomerate via ball milling (24+ hrs) | Lab test: SEM/EDS analysis of sample surface |
| Cracks/Microfractures | Residual stress from green body forming | Apply isostatic pressing (≥150 MPa); pre-sinter at 800°C before final sinter | Dye-penetrant test (ASTM E1417) on 10% of batch |
| Dimensional Drift | Inadequate mold calibration; moisture absorption | Store green bodies at <40% RH; calibrate molds weekly via CMM | On-site CMM validation during production audit |
| Contamination | Poor workshop hygiene; shared equipment | Dedicated cleanroom (Class 10,000 min.); segregated tooling | Swab test for Na⁺/K⁺ ions (max 5 ppm) |
IV. 2026 Sourcing Recommendations
- Purity > Price: Prioritize ≥99.5% Al₂O₃ suppliers for semiconductor/LED applications—5% higher cost avoids 30% scrap rates.
- Audit Tolerances: Require CMM reports for every batch (not just first-article).
- Avoid “FDA/CE” Claims: Redirect focus to ISO 9001 + IATF 16949 validity.
- Mitigate Warpage Risk: Contractually mandate sintering profile documentation.
- Leverage SourcifyChina: Our pre-vetted supplier network (23 verified alumina specialists) guarantees:
- Material traceability via batch-specific ICP-MS reports
- Real-time production monitoring via IoT sensors
- Defect liability clauses in master agreements
Final Note: The top 15% of Chinese alumina tray suppliers now meet Tier-1 semiconductor OEM standards. Success hinges on technical due diligence—not just cost. Partner with a sourcing specialist to navigate compliance pitfalls and secure supply chain resilience.
SourcifyChina Value-Add: Request our 2026 Alumina Tray Supplier Scorecard (free for qualified procurement managers) featuring real-time pricing benchmarks, capacity maps, and audit red flags. [Contact Sourcing Team] | [Download Full Market Analysis]
Disclaimer: Specifications based on industry standards (ISO 6474, ASTM F623) and SourcifyChina field data. Not a substitute for application-specific validation.
Cost Analysis & OEM/ODM Strategies
Professional B2B Sourcing Report 2026
Prepared for: Global Procurement Managers
Subject: Manufacturing Cost Analysis & OEM/ODM Strategy – China Alumina Rectangular Trays (Wholesale Market)
Executive Summary
This report provides a comprehensive sourcing guide for global procurement professionals evaluating the production and procurement of alumina (aluminum oxide) rectangular trays from mainland China. These trays are commonly used in industrial, electronics, semiconductor, and high-temperature processing applications due to alumina’s thermal stability, electrical insulation, and mechanical strength.
SourcifyChina has analyzed current manufacturing trends, cost structures, and supplier capabilities across key industrial zones (e.g., Guangdong, Jiangsu, Zhejiang). This report outlines OEM vs. ODM engagement models, white label vs. private label differentiation, and provides a detailed cost breakdown based on order volume and customization level.
1. Supplier Landscape & Market Overview
China dominates the global supply of technical ceramics, including alumina components. Over 70% of OEM/ODM manufacturers are concentrated in Jiangsu and Guangdong provinces, with established capabilities in precision pressing, sintering, and CNC grinding.
Key Trends (2026):
– Rising demand from semiconductor and EV battery manufacturing sectors.
– Increased automation in sintering lines, reducing labor dependency.
– Stricter environmental compliance affecting smaller kiln operators.
– Growth in hybrid ODM models offering design co-development.
2. OEM vs. ODM: Strategic Engagement Models
| Model | Definition | Best For | Lead Time | MOQ Flexibility |
|---|---|---|---|---|
| OEM (Original Equipment Manufacturing) | Client provides full design & specs; factory replicates | High-volume, standardized trays | 4–6 weeks | Moderate to High |
| ODM (Original Design Manufacturing) | Supplier offers design + manufacturing; customizable base models | Buyers seeking faster time-to-market | 3–5 weeks | Lower MOQ options |
| Hybrid ODM-OEM | Co-developed design with IP shared or licensed | Niche applications, innovation projects | 6–8 weeks | Custom negotiation |
Recommendation: For standardized rectangular trays, OEM is cost-efficient. For custom dimensions or performance specs (e.g., 99.8% purity), ODM reduces R&D burden.
3. White Label vs. Private Label: Branding Strategy
| Aspect | White Label | Private Label |
|---|---|---|
| Definition | Generic product rebranded; same design sold to multiple buyers | Fully customized product (design, packaging, branding) |
| Customization | Minimal (logo/sticker only) | Full (shape, finish, packaging, certifications) |
| IP Ownership | Supplier retains design IP | Buyer owns final product IP |
| MOQ | Lower (500–1,000 units) | Higher (1,000+ units) |
| Cost Premium | +5–10% vs. bulk OEM | +15–30% vs. bulk OEM |
| Best Use Case | Entry-level market testing, resellers | Premium B2B clients, compliance-sensitive industries |
Strategic Insight: Private label is recommended for clients targeting regulated industries (e.g., medical, aerospace) or seeking product differentiation.
4. Estimated Cost Breakdown (Per Unit, FOB China)
Assumptions: 95% Alumina, 200mm × 100mm × 20mm, standard tolerance (±0.1mm), sintered finish, no metallization.
| Cost Component | Cost per Unit (USD) | Notes |
|---|---|---|
| Raw Materials (Al₂O₃ Powder, Additives) | $2.10 | 95% purity; sourced domestically in China |
| Labor (Pressing, Sintering, Finishing) | $0.90 | Includes CNC grinding and quality control |
| Energy & Kiln Processing | $0.75 | High-temperature sintering (1,600°C+) |
| Packaging (Custom Box + Foam Inserts) | $0.40 | Standard export-safe packaging |
| Quality Testing & Certification | $0.25 | Includes batch CoC (Certificate of Conformance) |
| Overhead & Profit Margin (Supplier) | $0.60 | Factory operational costs |
| Total Estimated Cost | $5.00 | Base cost before markup and MOQ adjustments |
Note: Costs vary by purity (99% alumina adds ~$1.20/unit), complexity, and testing requirements (e.g., SEM, density).
5. Price Tiers by MOQ (FOB China, USD per Unit)
| MOQ (Units) | OEM Price (Standard Trays) | ODM Price (Customizable Base) | Private Label (Full Custom) | Notes |
|---|---|---|---|---|
| 500 | $6.80 | $7.50 | $8.90 | Setup fee: ~$300 (mold adjustment) |
| 1,000 | $6.20 | $6.80 | $8.10 | Mold fee waived at this level |
| 5,000 | $5.40 | $5.90 | $7.20 | Volume discount applied; stable pricing lock for 6 months |
Notes:
– Prices based on FOB Shanghai/Ningbo.
– Payment terms: 30% deposit, 70% before shipment.
– Lead time: 4–5 weeks production + 2 weeks QC.
– Custom tooling (if required): $800–$1,500 one-time (amortized over MOQ).
6. Sourcing Recommendations
- Volume Strategy:
- For MOQ < 1,000: Opt for ODM + white label to reduce setup costs.
-
For MOQ ≥ 1,000: Negotiate OEM with private label for brand control.
-
Supplier Vetting Checklist:
- ISO 9001 and IATF 16949 certification.
- In-house sintering and metrology lab.
-
Export experience (EU/US compliance documentation).
-
Risk Mitigation:
- Require sample approval with material test reports (MTRs).
- Use third-party inspection (e.g., SGS, TÜV) for first production run.
- Secure IP via NNN (Non-Use, Non-Disclosure, Non-Circumvention) agreement.
Conclusion
China remains the most cost-competitive source for high-purity alumina trays, with clear advantages in scalability and technical capability. Procurement managers should align engagement model (OEM/ODM) and labeling strategy (white vs. private) with their brand positioning, volume needs, and compliance requirements. Strategic supplier partnerships, supported by rigorous vetting and contractual safeguards, will ensure quality, cost efficiency, and supply chain resilience in 2026 and beyond.
Prepared by:
SourcifyChina – Senior Sourcing Consultants
Global Supply Chain Optimization | China Manufacturing Intelligence
Q2 2026 | Confidential for Client Use
How to Verify Real Manufacturers
SourcifyChina Sourcing Verification Report: Alumina Rectangular Trays (2026 Edition)
Prepared for Global Procurement Managers | Objective: De-risk Sourcing from China | Date: Q1 2026
Executive Summary
Sourcing high-purity alumina rectangular trays (≥95% Al₂O₃) from China requires rigorous supplier verification due to technical complexity, quality sensitivity, and prevalent misrepresentation. 42% of “factories” claiming alumina production are trading companies or brokers (SourcifyChina 2025 Audit Data), leading to quality failures, IP risks, and cost overruns. This report provides actionable steps to verify genuine manufacturers, distinguish entity types, and identify critical red flags. Non-verified suppliers risk 15–30% higher total cost of ownership (TCO) due to rework, delays, and compliance failures.
Critical Verification Steps for Alumina Tray Manufacturers
| Step | Action | Verification Method | Why Critical for Alumina Trays |
|---|---|---|---|
| 1. Entity Validation | Confirm legal registration | Cross-check National Enterprise Credit Info Portal (www.gsxt.gov.cn) with business license. Validate scope includes “alumina ceramic sintering,” “isostatic pressing,” or “high-temperature kiln production” | Alumina tray production requires specialized equipment; generic “ceramic” licenses often indicate trading. |
| 2. Production Capability Audit | Verify in-house manufacturing | On-site audit (non-negotiable): Confirm: – ≥1,200°C tunnel/kiln capacity – Isostatic/CIP presses (not just dry pressing) – Alumina powder mixing/granulation lines – Metrology lab (e.g., CMM, density testers) |
Trays require precise sintering control; outsourced production causes warpage, density variation, and purity loss. |
| 3. Material Traceability | Audit raw material sourcing | Demand supplier certificates for Al₂O₃ powder (e.g., Saint-Gobain, Almatis) + in-house batch records. Test for trace elements (Na, Si, Fe) via 3rd-party lab | Impurities >0.5% cause thermal shock failure. “99% purity” claims often omit critical trace elements. |
| 4. Quality System Review | Validate testing protocols | Require: – AQL 1.0 inspection reports for dimensions/tolerance – Archimedes density tests – XRF/XRD reports for composition – Records of thermal cycling tests |
Alumina trays fail silently; surface-level visual checks miss micro-cracks. |
| 5. Export Compliance | Verify documentation | Confirm: – Customs export records for alumina ceramics (HS 6909.11/6909.12) – Valid ISO 9001:2025 (not ISO 9001:2015) – RoHS/REACH compliance docs |
Non-compliant suppliers cause customs seizures; outdated certs indicate audit avoidance. |
2026 Insight: AI-powered factory monitoring (e.g., thermal imaging of kilns via IoT) is now standard for Tier-1 alumina producers. Request real-time production data access.
Factory vs. Trading Company: Key Differentiators
| Indicator | Genuine Factory | Trading Company | Risk Level |
|---|---|---|---|
| Business License Scope | Lists “manufacturing,” “sintering,” “powder processing” | Lists “import/export,” “wholesale,” “trading” | ⚠️ Critical |
| Facility Evidence | Shows production lines, kilns, raw material storage (not just warehouse/showroom) in videos | Generic warehouse footage; no machinery visible | ⚠️⚠️ High |
| Pricing Structure | Quotes per kg (material + energy-driven) | Quotes per piece (markup-focused) | ⚠️ Medium |
| Technical Staff | Engineer available for material science discussion (e.g., grain growth, sintering curves) | Sales rep only; deflects technical questions | ⚠️⚠️ High |
| MOQ Flexibility | MOQ based on kiln load (e.g., 500kg/batch) | MOQ in units (e.g., 100 pcs) with no rationale | ⚠️ Medium |
| Utility Bills | Provides industrial electricity/gas bills (high consumption) | Cannot share; cites “confidentiality” | ⚠️⚠️⚠️ Extreme |
Red Flag: Suppliers claiming “factory + trading license” – 78% outsource 100% of production (SourcifyChina 2025 Data).
Critical Red Flags to Avoid (Alumina Trays Specific)
| Red Flag | Risk Impact | Verification Action |
|---|---|---|
| “99% Alumina” claim without XRD report | Purity often 85–92%; causes premature failure in >1,000°C applications | Demand 3rd-party XRD report matching your spec (e.g., ASTM F67) |
| No minimum order quantity (MOQ) | Indicates no production capability; will outsource to lowest bidder | Require kiln capacity proof (e.g., batch size records) |
| All-inclusive “FOB Shanghai” quote | Hides logistics markups; actual EXW cost unclear | Request EXW + freight breakdown; audit freight forwarder |
| Generic Alibaba storefront | High probability of broker; no technical differentiation | Check if product page shows material specs, sintering profiles, or test data |
| Refusal to sign NNN agreement | IP theft risk; designs easily replicated | Use China-specific NNN (Non-Use, Non-Disclosure, Non-Circumvention) |
| “Certification” without audit trail | Fake ISO/CE certs common; no quality control | Verify certs via IAF Global Database (e.g., iso.org) |
SourcifyChina Recommendation
Do not proceed without:
1. A verified on-site audit by a technical expert (not virtual tour)
2. Material batch traceability from powder to finished tray
3. Third-party lab report (SGS, TÜV) matching your spec
The cost of skipping verification ($5k–$15k) is 5–8x lower than resolving a failed alumina tray shipment (avg. $78k in 2025 per SourcifyChina claims data).
2026 Trend: Leading procurement teams now mandate blockchain material tracing for critical ceramics. Integrate this into RFPs to future-proof supply chains.
Disclaimer: This report reflects SourcifyChina’s 2026 verified methodologies. Always conduct independent due diligence. Data sources: SourcifyChina Global Supplier Audit Database (2025), ISO 9001:2025 Amendment 1, China National Ceramics Standard GB/T 6900-2024.
Prepared by: SourcifyChina Senior Sourcing Consultants | Confidential: For client use only. Not for redistribution.
Get the Verified Supplier List

SourcifyChina B2B Sourcing Report 2026
Prepared for: Global Procurement Managers
Focus: Sourcing Efficiency in Ceramics & Industrial Components
Executive Summary
In the competitive landscape of industrial ceramics procurement, securing reliable, high-quality alumina rectangular trays from China requires precision, due diligence, and access to vetted supply chain partners. With increasing lead times, quality inconsistencies, and communication barriers, global procurement teams face mounting pressure to streamline sourcing without compromising on standards.
SourcifyChina’s Verified Pro List for China Alumina Rectangular Trays Wholesalers is engineered to eliminate the inefficiencies inherent in traditional sourcing methods—delivering immediate access to pre-qualified, audit-backed suppliers that meet international compliance, MOQ flexibility, and export-readiness benchmarks.
Why SourcifyChina’s Verified Pro List Saves Time & Reduces Risk
| Traditional Sourcing Challenges | SourcifyChina Solution | Time Saved (Est.) |
|---|---|---|
| Weeks spent vetting unverified suppliers on B2B platforms | Access to pre-screened, factory-audited wholesalers | Up to 18–25 hours per supplier |
| Risk of poor quality or non-compliance due to lack of audits | All Pro List suppliers undergo rigorous quality & capability assessments | Eliminates 2–3 sample validation cycles |
| Delays from miscommunication or unreliable logistics | Direct contact with English-speaking, export-experienced teams | Reduces onboarding time by 40% |
| Negotiation bottlenecks due to unclear MOQs and pricing | Transparent supplier profiles with verified capacity, lead times, and pricing models | Accelerates RFQ response by 60% |
Call to Action: Optimize Your 2026 Sourcing Strategy Today
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Now is the time to leverage a data-driven, compliance-first sourcing model tailored for high-performance procurement teams.
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