Mid-Back Ergonomic Mesh 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)	630 x 650 x 1050mm
Seat width	500 mm
Seat depth	480 mm
Seat height range	520mm
Backrest height	520 mm
Backrest width	480 mm
Fixed armrest height above seat	220 mm
Five-star base diameter	650 mm
Caster diameter	50 mm
Armrest pad dimensions	250 x 80 mm
Lumbar support zone height above seat	280mm
Seat height adjustment range	520mm
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	14kg
Recommended maximum user weight	120 kg
Seat static load capacity	150 kg
Backrest tilt lock range	105 degrees
Caster rolling durability	≥40000 cycles
Gas lift cycle life	≥100000 height adjustment cycles
Seam stitch pitch	35mm per 10 stitches
Tilt mechanism cycle life	≥80000 recline cycles
Seam stitch strength	≥160N pull force per stitch
Seat Foam Density / Rebound Reference	45kg/m³ / 65%

PRODUCT MODULE 03 / 06

Materials & Structure

Core acceptance fields · Panels / hardware / frame / upholstery

Backrest support frame	Black reinforced polypropylene (nylon)
Backrest upholstery	Black breathable woven polyester mesh
Seat cushion core	Molded high-density polyurethane foam, 50mm thickness
Seat upholstery	Black breathable woven fabric, 0.8mm thickness
Armrest structure	Reinforced nylon support post with soft TPU padded top surface
Five-star base	Glass fiber reinforced nylon (polyamide)
Height adjustment gas lift	Chrome-plated steel Class 3 gas lift, 50mm outer diameter
Tilt mechanism chassis	2.5mm thick stamped steel chassis with black powder coat finish
Casters	Black nylon dual-wheel hard floor casters
Internal seat support plate	12mm thick molded plywood under seat cushion
Backrest outer support frame	20% glass-fiber reinforced polypropylene (nylon), matte black finish, integrated geometric rib structure for mesh tension support
Armrest assembly	Reinforced nylon support post integrated with seat frame, 8mm thick soft TPU padded top surface, matte black finish

PRODUCT MODULE 04 / 06

Functions & Adjustment

Adjustment / rotation / tilt / mobility / storage features

Seat height adjustment	Pneumatic adjustment via right-side lever, 100mm vertical travel to match desk heights from 700mm to 780mm
Backrest tilt function	Synchro tilt mechanism allowing backrest recline up to 15 degrees from upright position, with tension adjustment knob under seat
Tilt lock function	Lockable in upright 90-degree position for focused task work, unlockable for free recline
Fixed arm support	Height-fixed armrests providing forearm support during typing, no height/width/pivot adjustment
Mobility function	Five dual-wheel casters allow smooth rolling on hard floors and low-pile commercial carpet, no brake mechanism
Lumbar support	Contoured frame-integrated curved lumbar zone supporting the natural lower back curve, no adjustable lumbar pad
Backrest synchro tilt	Weight-activated synchro tilt mechanism, 1:2.3 seat-to-back tilt ratio, allows maximum 15-degree back recline from upright 90-degree seated position
Tilt tension adjustment	Rotary tension knob under front of seat, adjusts recline resistance from 40N to 120N to match user weight between 50kg and 120kg
360-degree swivel	Full 360-degree horizontal rotation via gas lift swivel bearing, no rotation limit for easy access to surrounding work surfaces
Integrated lumbar support	Frame-integrated curved lumbar protrusion at 280mm above seat surface, provides 30mm forward support to maintain natural lumbar spine curve, no adjustable lumbar pad
Recline Angle / Lock Reference	125° with 3 suggested lock positions
Tilt Tension User-weight Range	Reference adjustment coverage 120kg

PRODUCT MODULE 05 / 06

Packaging & Logistics

Verified carton / gross weight / assembly / loading data

Reference Package Count	1 set / 2 cartons
Reference Assembly Time	40minutes per set
Reference Carton Dimensions	850 × 420 × 720mm
Reference Packaged Gross Weight	23kg/set
Reference Carton Volume	0.26m³/set
Indicative 20GP Loading	135 sets at 85% space utilization
Indicative 40HQ Loading	320 sets at 85% space utilization

PRODUCT MODULE 06 / 06

Applications & Usage

Recommended spaces / users / usage modes

Open plan office workstation use	Suitable for 780mm height standard office desks for daily 8 hour task work by general office staff
Home office study use	Appropriate for home study or work-from-home setups with compact footprint that fits small home workspaces
Conference/meeting room seating	Suitable for short to medium duration meeting use in boardrooms or conference areas with uniform black aesthetic that matches most office interiors
Training room seating	Durable construction and mobility suitable for multi-user training rooms where chairs are frequently repositioned
Call center seating	Breathable mesh back reduces heat buildup during extended seated shifts for call center operators
Training and multi-purpose room seating	Durable construction and omnidirectional wheeled mobility suit multi-user training rooms where chairs are frequently repositioned for flexible layouts
Call center/helpdesk seating	Breathable open mesh back reduces heat buildup during continuous 8 hour seated shifts for call center operators
Co-working space hot-desking use	Durable commercial-grade components and universal sizing suit shared hot-desk environments with rotating multi-user occupancy

STANDARD S1

EU EN Standards

European market access and chemical requirements

Applicable safety standard recommendation	EN 1335:2020 Office furniture - Office work chairs - Part 1: Dimensions - Safety requirements
Applicable stability standard recommendation	EN 1022:2018 Furniture - Seating - Determination of stability
EU dimensional safety recommendation	EN 1335:2020 Office furniture - Office work chairs - Part 1: Dimensions - Safety requirements
EU stability recommendation	EN 1022:2018 Furniture - Seating - Determination of stability
EU flame retardant recommendation	EN 1021:2014 Furniture - Assessment of ignitability of upholstered furniture - Part 1: Ignition source smouldering cigarette

STANDARD S2

North America ANSI/BIFMA Standards

US and Canada office-furniture standards

Applicable performance standard recommendation	ANSI/BIFMA X2017 Office Chairs - Tests
North American performance recommendation	ANSI/BIFMA X2017 Office Chairs - General purpose tests

STANDARD S3

China GB Standards

Standards applicable to China-market projects

Applicable safety standard recommendation	GB/T 38609 Office chair general technical requirements
Applicable durability standard recommendation	GB/T 10357.3 Test of mechanical properties of furniture - Strength and durability of chairs and stools
Safety standard recommendation	GB/T 38609 General technical requirements for office chairs
Mechanical durability recommendation	GB/T 10357.3 Test of mechanical properties of furniture - Strength and durability of chairs and stools
Fabric safety recommendation	GB 18401 National general safety technical code for textile products

Standard Tender Description

This product must meet the following technical requirements:
1. Applicable safety standard recommendation: GB/T 38609 Office chair general technical requirements;
2. Applicable durability standard recommendation: GB/T 10357.3 Test of mechanical properties of furniture - Strength and durability of chairs and stools;
3. Safety standard recommendation: GB/T 38609 General technical requirements for office chairs;
4. Mechanical durability recommendation: GB/T 10357.3 Test of mechanical properties of furniture - Strength and durability of chairs and stools;
5. Fabric safety recommendation: GB 18401 National general safety technical code for textile products;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.

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