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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)	635 × 640 × 1095 mm
Overall assembled dimensions	635 x 640 x 1095 mm
Seat width	505 mm
Seat depth	465 mm
Maximum seat height from floor	525 mm
Minimum seat height from floor	440 mm
Backrest width	430 mm
Backrest height	570 mm
Armrest height above seat	200 mm
Five-star base diameter	640 mm
Caster diameter	55 mm
Seat height adjustment stroke	85 mm
Seat cushion thickness	70 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	136 kg
Recommended user height range	183 cm
Product net weight	14.75 kg
Backrest maximum recline angle	125°
Mesh upholstery abrasion resistance	30000 Martindale cycles
Caster rolling durability rating	100000 cycles
Seat foam density	45 kg/m³
Mechanical component warranty	2 years
Seat Foam Density / Rebound Reference	45 kg/m³ / 65%
Back Foam Density Reference	38 kg/m³

PRODUCT MODULE 03 / 06

Materials & Structure

Core acceptance fields · Panels / hardware / frame / upholstery

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

Structural frame (back/arm support)	White molded nylon (polyamide)
Backrest upholstery	Dark grey 100% polyester breathable mesh
Seat cushion core	Molded high-density polyurethane foam
Seat upholstery	Dark grey wear-resistant polyester fabric
Five-star base	White molded nylon (glass-fiber reinforced)
Caster wheels	Black polyurethane (PU) swivel casters
Gas lift cylinder	Black powder-coated steel, Class 3 rated
Tilt mechanism	2.5mm thick stamped steel chassis
Armrest pads	Integral molded polypropylene with matte finish
Seat Internal Support Board Thickness	14 mm bent plywood or equivalent support board
Backrest Internal Frame Thickness	14 mm bent plywood/composite reinforced frame
Five-star Base Material Thickness	Metal base wall 3.5 mm; diameter 700 mm

PRODUCT MODULE 04 / 06

Functions & Adjustment

Adjustment / rotation / tilt / mobility / storage features

Data source: Functional configuration; the supplier specification prevails.

Seat height adjustment	Pneumatic gas lift with 85mm stroke, controlled by right-side under-seat lever
360-degree swivel rotation	Full rotation enabled by central swivel joint between seat and base
Lockable tilt recline	Backrest tilts up to 125° with tension adjustment, locks in upright position
Integrated lumbar support	Contoured mesh back provides fixed mid-back lumbar support
Fixed arm support	Non-adjustable T-shaped armrests provide stable forearm support at 200mm above seat
Rolling mobility	Five dual-wheel PU casters enable smooth movement on hard and low-pile carpet floors
Tilt tension control	Knob under seat adjusts recline resistance to match user weight
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-plan office workstations	Suitable for 8-hour daily staff use with compact footprint for standard desk layouts
Home office study spaces	Minimalist white and grey finish complements modern residential decor without occupying excess space
Meeting and collaboration zones	Mobile swivel design allows easy repositioning during team discussions
Co-working shared spaces	Durable construction and standard ergonomics support multi-user rotating use
Height range compatibility	Adjustable seat height fits standard 760 mm height office desks for proper ergonomic posture
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

EN 1335-1:2020	Applies to dimensional safety and performance requirements for office work chairs
EN 1335-2:2018	Applies to strength, durability and stability test methods for office seating
EN 1021-1:2014	Applies to upholstered furniture ignition resistance for smoldering cigarette sources

STANDARD S2

North America Purchasing & Inspection Reference * ANSI/BIFMA Standards

US and Canada office-furniture standards

ANSI/BIFMA X5.1-2017	Applies to structural durability, static load and cycle testing for general purpose office chairs

STANDARD S3

Standards Applicable to China-Market Projects * GB Standards

Standards applicable to China-market projects

GB/T 3326-2016	Applies to size measurement and dimensional tolerances for office furniture seating
GB/T 38609-2020	Applies to stability, strength and durability requirements for office task chairs
GB 18584-2001	Applies to formaldehyde emission limits for furniture components used in indoor spaces

Standardized tender description text

This product must meet the following technical requirements:
1. GB/T 3326-2016: Applies to size measurement and dimensional tolerances for office furniture seating;
2. GB/T 38609-2020: Applies to stability, strength and durability requirements for office task chairs;
3. GB 18584-2001: Applies to formaldehyde emission limits for furniture components used in indoor spaces;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.

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Product Description

The unbranded mid-back white frame mesh ergonomic office task chair, model OF-MB-WF-505, presents a clean minimalist modern visual defined by its crisp white structural frame paired with consistent dark grey seating and backrest elements. Its compact, balanced proportions align with standard desk layouts, featuring fixed T-shaped armrests that sit flush with the frame silhouette for a streamlined, uncluttered appearance suited to both professional and residential environments.
Construction pairs durable, purpose-built materials for long-term regular use: a molded white nylon frame forms the back and arm support structure, while a glass-fiber reinforced white molded nylon five-star base delivers stable weight distribution. The backrest is upholstered in dark grey 100% polyester breathable mesh, shaped to provide fixed contoured mid-back lumbar support without separate adjustable components. The seat uses a molded high-density polyurethane foam core with a 45 kg/m³ density, wrapped in dark grey wear-resistant polyester fabric. Mobility is supported by black polyurethane swivel casters, with a Class 3 rated black powder-coated steel gas lift and 2.5mm thick stamped steel tilt chassis forming the core movement hardware; armrest pads are integral matte-finish molded polypropylene.
Core functional features support comfortable extended use: pneumatic seat height adjustment with an 85mm stroke is controlled via a right-side under-seat lever, enabling a maximum seat height of 525mm from the floor to pair with standard 760mm height office desks. The chair supports full 360-degree swivel rotation, with a lockable tilt mechanism that allows backrest recline up to 125 degrees, paired with an under-seat tension knob to adjust recline resistance to match user weight, plus a lock for the fully upright position. The five dual-wheel PU casters enable smooth movement across hard floors and low-pile carpet, with fixed T-armrests positioned 200mm above the seat to provide stable forearm support. The mesh backrest holds a 30000 Martindale cycle abrasion resistance rating, casters are rated for 100000 rolling cycles, and the chair supports a maximum static load of 136kg, with compatibility for users up to 183cm tall.
This chair fits a range of use cases: its compact footprint makes it ideal for 8-hour daily use at open-plan office workstations, while its neutral two-tone finish complements modern residential decor for home office study spaces. The mobile swivel design supports easy repositioning in meeting and collaboration zones, and its durable construction suits multi-user rotating use in co-working shared spaces. It pairs well with standard workstations as well as 2.4m executive desks.
For procurement planning, note each chair is shipped across two cartons with a total packaged gross weight of 23kg and total carton volume of 0.26 cubic meters per set, with an assembly time of 40 minutes per unit. A 20-foot GP container can hold 135 sets at 85% space utilization, ideal for bulk outfitting projects.

Mid-Back White Frame Mesh Ergonomic Office Task Chair Specifications

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