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PRODUCT MODULE 01 / 06

Physical Dimensions

Automatic mm / inch conversion · Core engineering specifications

Data source: Structured from factory data; final measured values prevail.

Overall dimensions (W × D × H)	580 × 620 × 990 mm
Seat width	490 mm
Seat depth	420 mm
Maximum seat height (floor to seat top)	530 mm
Backrest width	450 mm
Backrest height (seat to back top)	510 mm
Seat cushion thickness	60 mm
Armrest height above seat	180 mm
Five-star base diameter	620 mm
Minimum seat height (floor to seat top)	430 mm
Finished Seat Cushion Thickness	90 mm
Backrest Padding Thickness	70 mm
Lumbar Support Zone Height	240 mm
Clear Width Between Armrests	540 mm

PRODUCT MODULE 02 / 06

Weight, Load & Performance

Net weight / load capacity / users / durability

Data source: Product performance data; verify exact test conditions before procurement.

Recommended maximum static load capacity	120 kg
Net weight	13.5 kg
Recommended user height range	1800 mm
Recline angle maximum	125°
Gas lift stroke	100 mm
Seat Foam Density / Rebound Reference	45 kg/m³ / 65%
Back Foam Density Reference	38 kg/m³
Upholstery Thickness / Abrasion Reference	1.4 mm / 50000 cycles
Five-star Base Static Load Reference	Acceptance target ≥120 kg; chair reference load 150 kg
Caster Rolling Durability Reference	Acceptance target 30000 cycles

PRODUCT MODULE 03 / 06

Materials & Structure

Core acceptance fields · Panels / hardware / frame / upholstery

Data source: Subject to the factory material list and inspection report.

Backrest frame	Reinforced black nylon frame
Backrest support surface	Breathable woven polyester mesh
Integrated lumbar support	Fixed molded plastic lumbar contour
Seat cushion core	High-density molded polyurethane foam
Seat upholstery	Tight-wear polyester fabric cover
Armrests	Fixed loop-style black nylon armrests
Central support column	Steel pneumatic gas lift cylinder
Five-star base	Glass-filled nylon star base
Casters	50mm dual-wheel nylon casters
Tilt mechanism plate	2.5mm thick stamped steel butterfly chassis
Seam stitch pitch	8 stitches per inch
Seat Internal Support Board Thickness	14 mm bent plywood or equivalent support board

PRODUCT MODULE 04 / 06

Functions & Adjustment

Adjustment / rotation / tilt / mobility / storage features

Data source: Functional configuration; the supplier specification prevails.

Pneumatic seat height adjustment	Under-seat lever operated, 100mm travel between 530 mm seat height
360-degree swivel rotation	Full rotation around central gas column for multi-directional access
Tilt and lock mechanism	Tilt tension adjustable, locks in upright 90° position, maximum 125° recline
Fixed integrated lumbar support	Contoured support positioned for mid-back alignment, no adjustment required
Smooth rolling mobility	Dual-wheel casters roll on hard floor and low-pile carpet without marking
Waterfall seat edge	Curved front seat edge reduces thigh pressure during extended seating
Fixed loop armrest support	Stable arm support fixed at 180mm above seat, no height or width adjustment
Recline Angle / Lock Reference	125° with 3suggested lock positions
Tilt Tension User-weight Range	Reference adjustment coverage 120 kg
Rotation / Mobility Configuration	360° swivel with 5-caster multidirectional movement

PRODUCT MODULE 05 / 06

Packaging & Logistics

Verified carton / gross weight / assembly / loading data

Data source: Reference for export quotations and container planning.

Reference Package Count	1 set / 2 cartons
Reference Assembly Time	40 minutes per set
Reference Carton Dimensions	850× 420× 720 mm
Reference Packaged Gross Weight	23 kg/set
Reference Carton Volume	0.26 m³/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

Data source: Recommended applications based on product form and category.

Open office workstations	Fits standard 760 mm height desks for daily employee task work
Home office spaces	Compact footprint fits small home desk setups for remote work
Conference and meeting rooms	Swivel and mobility support collaborative meeting use
Cubicle work areas	Fixed armrests fit standard cubicle desk clearances without protrusion
Training room seating	Durable construction supports frequent use by rotating users
Recommended Matching Desk Size	2.4 m executive desk
Reference Daily Use Duration	8 hours/day; confirm by ergonomic testing

STANDARD S1

EU Market Entry Requirements * EN Standards

EU Market Access Requirements* EN Standards

Office chair safety standard	EN 1335:2020
Office chair stability standard	EN 1335:2018
Office chair test method standard	EN 1335:2018

STANDARD S2

North America Purchasing & Inspection Reference * ANSI/BIFMA Standards

US and Canada office-furniture standards

General purpose office chair standard	ANSI/BIFMA X2017
Caster performance requirement	ANSI/BIFMA X5.1 Clause 17
Gas lift performance requirement	ANSI/BIFMA X5.1 Clause 8
Caster rolling durability	40000 cycles

STANDARD S3

Standards Applicable to China-Market Projects * GB Standards

Standards applicable to China-market projects

Office chair strength and durability standard	GB/T 3326
Office chair dimensional standard	GB/T 3327
Formaldehyde emission standard	GB 18584

Standardized tender description text

This product must meet the following technical requirements:
1. Office chair strength and durability standard: GB/T 3326;
2. Office chair dimensional standard: GB/T 3327;
3. Formaldehyde emission standard: GB 18584;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.

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Product Description

The MB-MESH-TASK-620BASE mid-back mesh ergonomic office task chair delivers balanced, structured support for regular daily seating use, with a streamlined, professional silhouette suited to a range of work environments. Its form features a contoured mid-height backrest paired with a generously padded seat, fixed loop-style armrests that sit flush with the chair’s frame to avoid overhang, and a smooth five-star caster base that creates a stable, compact footprint suited to close-quarters desk setups.
Constructed for consistent long-term use, the chair features a reinforced black nylon frame supporting a breathable woven polyester mesh back surface, which is shaped with a fixed molded plastic lumbar contour aligned to support natural mid-back posture without manual adjustment. The seat uses a high-density molded polyurethane foam core wrapped in a tight-wear polyester fabric cover, finished with a curved waterfall front edge to reduce pressure on the thighs during extended periods of sitting. Fixed black nylon armrests offer stable upper body support, while a steel pneumatic gas lift cylinder connects the seat to a glass-filled nylon five-star base fitted with dual-wheel nylon casters that roll smoothly across hard floors and low-pile carpet without leaving surface marks.
Core functional features include under-seat lever operated pneumatic seat height adjustment, full 360-degree swivel rotation for easy multi-directional access to work surfaces, and a tilt mechanism with adjustable tension that locks in the full upright position and supports a maximum 125-degree recline. The fixed armrests are positioned to align with standard desk clearances, eliminating awkward protrusions that can catch on desk edges in tight spaces.
This chair is well suited for a wide range of commercial and residential spaces, including open office workstations paired with standard height desks, compact home office setups for remote work, conference and meeting rooms where swivel and mobility support collaborative discussion, cubicle work areas, and high-traffic training rooms with rotating users. It is also compatible with larger executive desk formats.
For procurement planning, note each unit ships in two cartons, with a typical assembly time of 40 minutes per set. The chair supports a maximum static load of 120 kg, and is sized to accommodate users up to 1800 mm in height, with no adjustable armrest or lumbar positioning to simplify setup and reduce long-term maintenance needs. Bulk shipping calculations confirm high load efficiency for full container orders, making the model a practical choice for large-scale furnishing projects.

Mid-Back Mesh Ergonomic Office Task Chair with Fixed Armrests Specifications

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