Mid-Back Dual-Lumbar Mesh Ergonomic Office Task Chair

Submitted	Field	Original	修改后参数	Note / Status
No corrections yet. Use the flag at the end of a row to report an issue.

PRODUCT MODULE 01 / 06

Physical Dimensions

Automatic mm / inch conversion · Core engineering specifications

Overall dimensions	640 x 660 x 1120mm
Seat width	500 mm
Seat depth	480 mm
Seat height range	520mm
Backrest total height	580 mm
Armrest height above seat	90mm
Armrest pad dimensions	100 x 250 mm
Five-star base diameter	620 mm
Caster diameter	50 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

Net weight range	16kg
Maximum recommended static load	120 kg
Seat foam density	45 kg/m³
Back mesh tensile strength	≥300 N/5cm
Seat cushion thickness	50 mm
Seam stitch pitch	10 stitches per inch
Recommended user weight range	110kg
Maximum recommended static occupant load	120kg
Seat molded foam density	45±5 kg/m³
Seat fabric abrasion resistance	≥30,000 Martindale cycles

PRODUCT MODULE 03 / 06

Materials & Structure

Core acceptance fields · Panels / hardware / frame / upholstery

Backrest surface	Breathable woven polyester mesh, black
Seat surface	Woven black fabric over high-resilience foam
Back frame	Injection-molded black nylon (PA6)
Armrests	Injection-molded black polypropylene with flat padded top
Five-star base	Glass-fiber reinforced injection-molded black nylon
Gas lift cylinder	Chrome-plated steel, Class 3
Height adjustment mechanism	Black steel and nylon synchro-tilt chassis
Casters	Black polyurethane twin-wheel casters, nylon stem
Upper backrest surface	Breathable woven black polyester mesh, stretched taut over nylon frame
Lower backrest surface	Breathable woven black polyester mesh, stretched over contoured nylon support frame
Seat upholstery	Woven black polyester fabric, laminated over high-resilience molded polyurethane foam
Internal seat support frame	1.8mm thick stamped steel plate, powder-coated black

PRODUCT MODULE 04 / 06

Functions & Adjustment

Adjustment / rotation / tilt / mobility / storage features

Seat height adjustment	Pneumatic adjustment via under-seat lever, 100mm total travel between 520mm seat height
Backrest tilt function	Synchro tilt with 3-position tilt lock, 12° maximum backward tilt angle
Armrest adjustment	Height-adjustable armrests with 20mm vertical travel, fixed horizontal position
Dual lumbar support	Two integrated curved mesh support zones positioned for lower and mid-lumbar spine contact
Caster mobility	5 dual-wheel swivel casters enabling omnidirectional rolling on hard floors and low-pile carpet
Backrest synchro tilt	Weight-activated synchro tilt mechanism, 12° maximum backward tilt angle, with 3-position lock (upright, mid-tilt, full recline) and adjustable tilt tension knob
Dual-zone lumbar support	Two fixed-position curved contoured mesh support zones, positioned to contact L5-S1 lower lumbar and L3-L4 mid-lumbar spine during upright sitting
Omnidirectional mobility	5 brake-free twin-wheel swivel casters, enabling 360° rolling movement on hard floors and ≤6mm pile carpet
Waterfall seat pressure relief	Contoured front seat edge with 20mm downward slope, reducing contact pressure on the posterior thigh to improve lower limb circulation
Recline Angle / Lock Reference	125° with 3 suggested lock positions
Tilt Tension User-weight Range	Reference adjustment coverage 120kg
Rotation / Mobility Configuration	360° swivel with 5-caster multidirectional movement

PRODUCT MODULE 05 / 06

Packaging & Logistics

Verified carton / gross weight / assembly / loading data

Number of packages	1 carton
Single carton dimensions	650 x 620 x 540 mm
Gross weight per carton	19kg
Carton cubic volume (CBM)	0.218 CBM
Estimated assembly time	15minutes per unit
20ft GP container loading quantity	140 units
40ft HQ container loading quantity	330 units
Single outer carton dimensions	650 x 320 x 540mm
Carton cubic volume	0.112 CBM
Estimated on-site assembly time	15minutes per unit

PRODUCT MODULE 06 / 06

Applications & Usage

Recommended spaces / users / usage modes

Open plan office workstations	Suitable for 8-hour daily task use at standard 760mm height office desks, mesh back provides ventilation for warm office environments
Home office workspaces	Compact footprint fits small home work areas, rolling casters allow easy repositioning between work and non-work activities
Conference and meeting rooms	Stackless rolling design allows flexible arrangement around conference tables, neutral black finish matches most commercial interior styles
Hot-desking shared workspaces	Durable construction and easy adjustment supports shared use by multiple users of varying heights, with no complex custom adjustment settings
Reception and visitor areas	Ergonomic support for short to medium duration visitor seating, professional appearance suits client-facing office zones
Shared hot-desking workspaces	Simple lever-operated height and tilt controls require no custom user programming, durable construction supports rotating use by 185cm tall users without readjustment delays
Reception and administrative areas	Mid-back ergonomic support provides comfortable seating for administrative staff and short-stay visitors, formal unbranded design suits client-facing front-of-house zones
Recommended Matching Desk Size	2.4m executive desk

STANDARD S1

EU EN Standards

European market access and chemical requirements

EN 1335-1:2020	Applicable office work chair dimensional, safety and strength requirement, used as acceptance reference for European market shipments
EN 1335-2:2018	Applicable safety performance test standard for office seating, covering stability, load, and durability test methods for contract use
EN 1022:2018	Applicable furniture seating stability standard, used to verify tip-over resistance when tilting back or reaching sideways

STANDARD S2

North America ANSI/BIFMA Standards

US and Canada office-furniture standards

ANSI/BIFMA X5.1-2017 (Tests 5, 8, 13, 17)	Recommended North American office chair standard, specifying minimum requirements for caster durability, base static load, backrest cyclic fatigue, and gas lift safety, referenced for 8-hour daily commercial use

STANDARD S3

China GB Standards

Standards applicable to China-market projects

GB/T 3326-2016	Applicable dimensional tolerance and stability requirement for office seating, used as acceptance reference for measured dimensions and tip-over resistance
GB/T 10357.3-2013	Applicable mechanical performance test standard for office chairs, covering seat static load, backrest static load, and fatigue durability requirements for commercial use
GB 28007-2011	Applicable safety standard for children? No, correction: GB/T 27742 Office chair gas lift safety requirement, applicable for verifying cylinder burst resistance and structural safety
GB/T 27742-2011	Recommended safety standard for office chair gas lift cylinders, covering burst pressure, axial load, and cyclic durability requirements for pneumatic height adjustment components
GB 18584-2001	Recommended indoor furniture hazardous substance limit standard, covering formaldehyde and heavy metal content limits for upholstered seating components

Standard Tender Description

This product must meet the following technical requirements:
1. GB/T 3326-2016: Applicable dimensional tolerance and stability requirement for office seating, used as acceptance reference for measured dimensions and tip-over resistance;
2. GB/T 10357.3-2013: Applicable mechanical performance test standard for office chairs, covering seat static load, backrest static load, and fatigue durability requirements for commercial use;
3. GB 28007-2011: Applicable safety standard for children? No, correction: GB/T 27742 Office chair gas lift safety requirement, applicable for verifying cylinder burst resistance and structural safety;
4. GB/T 27742-2011: Recommended safety standard for office chair gas lift cylinders, covering burst pressure, axial load, and cyclic durability requirements for pneumatic height adjustment components;
5. GB 18584-2001: Recommended indoor furniture hazardous substance limit standard, covering formaldehyde and heavy metal content limits for upholstered seating components;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.

GENERATED EXPORTS

Ready-to-use export tools

Export data is generated from the current published product record.

Technical Report PDF

Directly download an English report in metric or imperial units.

PDF · OFM-MB-DL-01

Complete Parameter Workbook

Download all product information and parameter modules in English.

XLSX · OFM-MB-DL-01

International Listing Template

English title, specifications, materials, standards and purchasing fields.

XLSX · LISTING

Customs Declaration Data

Prepare customs description, material, usage, dimensions and declaration elements.

CUSTOMS · OFM-MB-DL-01Open Export Tool

Quick Actions

Post Inquiry

FurnDim

OFM-MB-DL-01