Mid-Back Mesh Swivel Office Task Chair

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PRODUCT MODULE 01 / 06

Physical Dimensions

Automatic mm / inch conversion · Core engineering specifications

Overall dimensions (W x D x H)	620 x 630 x 1020mm
Seat width	480 mm
Seat depth	470 mm
Seat height range	500mm
Backrest height	520 mm
Backrest width	460 mm
Fixed armrest height above seat	210 mm
Armrest length	240 mm
Five-star base diameter	640 mm
Caster diameter	50 mm
Sitting knee clearance height	≥ 640 mm
Finished Seat Cushion Thickness	90mm
Backrest Padding Thickness	70mm
Lumbar Support Zone Height	240mm
Clear Width Between Armrests	540mm

PRODUCT MODULE 02 / 06

Weight, Load & Performance

Net weight / load capacity / users / durability

Product net weight	14.5kg
Recommended user weight capacity	120 kg
Seat foam density	50kg/m³
Seat foam thickness	50 mm
Backrest lumbar support static load	≥75 kg
Caster rolling durability	≥100,000 rolling cycles
Gas lift cyclic durability	≥100,000 height adjustment cycles
Available color options	1 standard (all black)
Recommended maximum user weight capacity	120kg
Seat foam rebound rate	≥40%

PRODUCT MODULE 03 / 06

Materials & Structure

Core acceptance fields · Panels / hardware / frame / upholstery

Backrest support frame	Reinforced black polypropylene (PP)
Backrest upholstery	Breathable woven polyester mesh
Seat support inner frame	12mm thick molded plywood
Seat upholstery outer layer	Woven black polyester fabric
Seat cushion fill	High-resilience polyurethane foam
Armrests	Integral molded black polypropylene (PP) with fixed closed-loop support
Height adjustment gas lift	Chrome-plated steel Class 3 gas lift, 50mm outer tube diameter
Tilt mechanism chassis	2.5mm thick stamped steel, black powder coated finish
Five-star base	Glass-fiber reinforced black nylon (PA), 2.5mm average wall thickness
Casters	Black polyurethane (PU) tread twin-wheel casters, swivel 360 degrees
Height/tilt control levers	Black PP coated steel levers
Tilt tension adjustment knob	Black PP molded rotary knob, mounted to front underside of seat chassis, knurled surface for grip

PRODUCT MODULE 04 / 06

Functions & Adjustment

Adjustment / rotation / tilt / mobility / storage features

Seat height adjustment	Pneumatic adjustment via right-side paddle lever, 80mm total stroke to accommodate 185cm user height
Backrest tilt function	110 degree synchro tilt, lockable in upright position via right-side lever, tilt tension adjustable via front tension knob
360-degree swivel rotation	Full 360° horizontal rotation around central gas lift axis, no rotation lock
Smooth rolling mobility	5x 50mm twin-wheel casters roll freely on hard flooring and low-pile carpet, no brake mechanism as standard
Integrated lumbar support	Curved mid-back mesh frame provides static lumbar support aligned to lower back curve, no adjustable lumbar pad
Fixed arm support	Closed-loop fixed armrests provide stable forearm support at fixed height, no height/pivot/width adjustment
Weight-activated tilt tension	Rotating front tension knob adjusts tilt resistance to match user weight for controlled recline
Tilt tension adjustment	Rotary front-mounted knob adjusts tilt resistance from 40Nm to 90Nm to match user weight between 50kg and 120kg for controlled recline
Mobility function	5x 50mm twin-wheel casters roll freely on hard tile/wood flooring and low-pile carpet (≤6mm pile height), rolling resistance ≤15N per caster for easy repositioning
Lumbar support	Integrated curved raised section on PP back frame provides static lumbar support aligned to the L3-L4 lower back curve, no adjustable lumbar pad as standard
Seat edge pressure relief	Contoured waterfall front seat edge reduces 20% of thigh pressure compared to straight edges for extended sitting sessions
Recline Angle / Lock Reference	125° with 3 suggested lock positions

PRODUCT MODULE 05 / 06

Packaging & Logistics

Verified carton / gross weight / assembly / loading data

Number of shipping packages	1 carton per chair, KD (knocked down) assembly
Shipping carton dimensions	650 x 600 x 530 mm
Gross shipping weight per carton	16.5kg
Shipping volume (CBM) per unit	0.206 CBM
Recommended assembly time	15minutes per unit for 1 person with standard tools
20ft GP container loading quantity	145 units
40ft HQ container loading quantity	360 units
Included hardware kit	All required bolts, Allen key and assembly instructions included per unit
Shipping carton outer dimensions	650 x 600 x 530mm
Shipping volume per unit	0.206 CBM

PRODUCT MODULE 06 / 06

Applications & Usage

Recommended spaces / users / usage modes

Open plan office workstations	Suitable for 8-hour daily use at standard 760mm height office desks for general administrative and computer work
Home office workspaces	Compact footprint fits small home desk setups, neutral black finish matches most desk styles
Conference and meeting rooms	Swivel and tilt function supports collaborative meeting use, fixed armrests allow easy push-in under standard conference tables
Co-working shared spaces	Durable mesh back and fabric seat withstands frequent multi-user use, easy to move between workstations
Training room seating	Lightweight construction allows easy rearrangement for training sessions, stackable? No, non-stackable but KD design allows compact storage when disassembled
Corporate training rooms	KD design allows compact bulk storage when disassembled for off-peak periods, no adjustable arm/lumbar parts reduces maintenance and damage risk in high-traffic training environments
Temporary call center seating	Breathable mesh back reduces heat buildup for 6 hour continuous phone-based work, standardized black finish allows easy replacement of damaged units without finish mismatch across large deployments
Recommended Matching Desk Size	2.4m executive desk

STANDARD S1

EU EN Standards

European market access and chemical requirements

EN 1335-1:2000	Office furniture - Office work chairs - Part 1: Dimensions - reference for minimum seat dimension, clearance and height adjustment range suitability for office use
EN 1335-2:2018	Office furniture - Office work chairs - Part 2: Safety requirements - reference for structural safety, stability and component strength requirements for commercial use
EN 1335-3:2009	Office furniture - Office work chairs - Part 3: Test methods - reference for verification of static load, durability and stability performance

STANDARD S2

North America ANSI/BIFMA Standards

US and Canada office-furniture standards

ANSI/BIFMA X5.1-2017	Office Chairs - General Purpose - reference for standard performance, safety and durability requirements for general office task chairs, including back strength, seat load, caster and base testing
Seat pan static load capacity	≥150 kg

STANDARD S3

China GB Standards

Standards applicable to China-market projects

GB/T 39222-2020	Office furniture - Office chairs
GB 28007-2011	General technical requirements for children's furniture (if used in training spaces for minors)
GB/T 19995.2-2005	Office furniture - Part 2: Safety requirements

Standard Tender Description

This product must meet the following technical requirements:
1. GB/T 39222-2020: Office furniture - Office chairs;
2. GB 28007-2011: General technical requirements for children's furniture (if used in training spaces for minors);
3. GB/T 19995.2-2005: Office furniture - Part 2: Safety requirements;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.

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