Mid-back Mesh Office Task Chair with Fixed Armrests

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PRODUCT MODULE 01 / 06

Physical Dimensions

Automatic mm / inch conversion · Core engineering specifications

Overall dimensions (W x D x H)	650 x 660 x 1080mm
Seat width	490 mm
Seat depth	470 mm
Seat height range (floor to seat top)	520mm
Backrest height (seat junction to back top)	520 mm
Backrest width (widest point)	460 mm
Fixed armrest height (seat to armrest top)	230 mm
Armrest spacing (between inner arm surfaces)	480 mm
5-star base diameter	640 mm
Caster diameter	50 mm
Seat width (widest usable surface)	490 mm
Seat depth (front edge to seat-back junction)	470 mm
Backrest width (widest lumbar zone)	460 mm
Fixed armrest height (seat surface to armrest top)	230 mm
Armrest inner clearance (between opposing armrest surfaces)	480 mm
5-star base outer diameter	640 mm

PRODUCT MODULE 02 / 06

Weight, Load & Performance

Net weight / load capacity / users / durability

Net weight range	15.5kg
Recommended static load capacity	120 kg
Seat foam density	45kg/m³
Seat foam thickness	60 mm
Backrest lumbar support static load	≥45 kg
Caster rolling durability	≥50,000 rolling cycles
Swivel rotation	360 degrees
Seat tilt range	12 degrees
Net product weight	16kg
Recommended maximum static occupant load	120 kg

PRODUCT MODULE 03 / 06

Materials & Structure

Core acceptance fields · Panels / hardware / frame / upholstery

Backrest support	Tensioned grey woven polyester mesh with vertical ribbed texture
Seat upholstery	Woven grey polyester fabric over foam cushion
Seat cushion core	High-resilience polyurethane foam
Armrest construction	Injection-moulded light grey nylon with integrated padded top surface
Seat frame and structure	2.0mm thick reinforced steel inner frame with nylon outer seat pan
Gas lift cylinder	Chrome-plated steel Class 3 gas lift with black plastic telescopic dust cover
Chair base	Injection-moulded light grey nylon 5-star leg structure
Casters	Dual-wheel polyurethane casters with grey wheel and black rubber rolling surface
Tilt mechanism	2.5mm thick steel plate knee-tilt mechanism with black plastic adjustment lever
Backrest upholstery	Tensioned grey woven polyester mesh with horizontal ribbed weave, mounted to a nylon inner back frame
Inner load-bearing seat frame	2.0mm thick reinforced steel tube frame wrapped in injection-moulded grey nylon outer seat pan
5-star chair base	Injection-moulded light glass-fibre reinforced nylon 5-leg structure, 3.0mm average wall thickness

PRODUCT MODULE 04 / 06

Functions & Adjustment

Adjustment / rotation / tilt / mobility / storage features

Seat height adjustment	100mm vertical travel via left-side paddle lever, operated by pneumatic gas lift
Tilt function	Synchronized knee-tilt mechanism allowing 12 degree backward tilt, with adjustable tension knob under right side of seat
Upright tilt lock	Lockable in fully upright position for focused desk work
360-degree swivel	Full rotation around central axis for easy access to surrounding desk areas without standing
Mobility function	5 dual-wheel casters allow smooth rolling on hard floors and low-pile office carpet
Back support function	Integrated curved lumbar zone built into mesh back provides lower back support without adjustable pad
Seat edge pressure relief	Contoured waterfall front seat edge reduces pressure on back of thighs during extended sitting
Upright position tilt lock	Lockable in fully upright seated position via control lever, providing stable support for focused keyboard work and writing
360-degree swivel rotation	Full unlimited rotation around the central gas lift axis, allowing users to access adjacent desk surfaces and storage without standing
Smooth mobility	5 dual-wheel casters provide omnidirectional smooth rolling on hard wood, tile, and low-pile office carpet (≤6mm pile), rolling resistance ≤15N on hard surfaces
Passive lumbar support	Integrated contoured lumbar zone in the mesh back matches the natural inward curve of the lower spine, providing consistent support without adjustable pads, positioned 220mm above the seat surface
Pressure-relief seat edge	Contoured waterfall front seat edge with a 20° downward slope reduces contact pressure on the posterior thigh by 30% (reference) during extended 8-hour sitting, restricting popliteal vein compression

PRODUCT MODULE 05 / 06

Packaging & Logistics

Verified carton / gross weight / assembly / loading data

Packaged piece count	1 unit per export carton, semi-knocked down assembly (base, casters, seat/back assembly separated)
Reference carton dimensions	680 x 630 x 580 mm
Reference gross weight per carton	18kg
Reference CBM per unit	0.25 CBM
Assembly time range	12minutes per unit
Reference 40HQ container load quantity	450 units
Packaged configuration	1 unit per 5-layer corrugated export carton, semi-knocked down assembly (5-star base, 5 loose casters, seat-back integrated assembly, gas lift, hardware kit separated) with EPS foam corner protection and PE film wrap
Reference carton dimensions (L x W x H)	680 x 630 x 580 mm
Reference volume per unit	0.25 CBM
Assembly time per unit	15minutes

PRODUCT MODULE 06 / 06

Applications & Usage

Recommended spaces / users / usage modes

Open office workstations	Suitable for long-duration daily desk work in open plan offices, breathable mesh back reduces heat build-up during 8-hour shifts
Home office setup	Compact footprint fits standard home office desks without requiring large clearance space
Meeting and conference rooms	Neutral grey finish and understated design coordinates with most modern conference table styles
Training room seating	Smooth casters and swivel function allow easy reorientation during training sessions, fixed armrests provide consistent support
Height-compatible desks	Designed for use with standard 760mm height office desks, matching fixed armrest height for proper typing posture
Open-plan office workstations	Suitable for 8-hour daily desk work in open office environments, breathable mesh back reduces heat and moisture build-up during extended shifts, compatible with standard 1200x600mm workstation desks
Training and classroom spaces	Smooth omnidirectional casters and 360° swivel allow easy reorientation during interactive training sessions, fixed armrests provide consistent upper body support for users of different heights, durable fabric withstands frequent daily use
Co-working shared workspaces	Standardized dimensions and simple durable construction suit high-turnover shared desk environments, 120kg load capacity accommodates a wide range of users, easy assembly reduces maintenance and replacement time

STANDARD S1

EU EN Standards

European market access and chemical requirements

Recommended EN office furniture standard	EN 1335:2020
Recommended EN strength standard	EN 1335:2018
Recommended EN upholstery standard	EN 14465:2003
Recommended office chair safety standard	EN 1335:2020
Recommended strength and durability standard	EN 1335:2018
Recommended upholstery abrasion standard	EN 14465:2003

STANDARD S2

North America ANSI/BIFMA Standards

US and Canada office-furniture standards

Recommended BIFMA standard	ANSI/BIFMA X2017
Recommended BIFMA caster standard	ANSI/BIFMA X2017 Clause 17
Recommended general office chair standard	ANSI/BIFMA X2017
Recommended caster performance standard	ANSI/BIFMA X2017 Clause 17

STANDARD S3

China GB Standards

Standards applicable to China-market projects

Recommended GB compliance standard	GB/T 3326
Recommended stability standard	GB/T 10357.2
Recommended durability standard	GB/T 10357.3
Recommended hardware safety standard	GB 28007
Recommended dimensional compliance standard	GB/T 3326
Recommended gas lift safety standard	GB 28007

Standard Tender Description

This product must meet the following technical requirements:
1. Recommended GB compliance standard: GB/T 3326;
2. Recommended stability standard: GB/T 10357.2;
3. Recommended durability standard: GB/T 10357.3;
4. Recommended hardware safety standard: GB 28007;
5. Recommended dimensional compliance standard: GB/T 3326;
6. Recommended gas lift safety standard: GB 28007;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.

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