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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)	625 × 680 × 1180 mm
Seat width	490 mm
Seat depth	445 mm
Seat height adjustment range (to floor)	505 mm
Backrest height (above seat)	560 mm
Armrest height above seat	190 mm
Five-star base wheel tip span	680 mm
Headrest vertical adjustment travel	40 mm
Headrest width	340 mm
Backrest upper width	475 mm
Maximum backrest height above floor	1180 mm
Caster diameter	60 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 user weight	136 kg
Net weight	21 kg
Recline angle range	130 degrees
Gas lift cycle durability	300000 cycles
Caster rolling durability	100000 cycles
Tilt mechanism cycle rating	300000 cycles
Seat foam density	50 kg/m³
Seat foam thickness	80 mm
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.

Backrest upholstery	Breathable woven polyester mesh
Backrest support frame	PA nylon reinforced with 20% glass fiber
Seat cushion core	50kg/m³ high-density cold-cured molded foam
Seat cushion underside	12mm thick molded plywood support board
Armrests	Fixed PP nylon frame with 10mm thick PU padded tops
Headrest cushion	15mm thick molded foam pad over mesh insert
Five-star base	3mm thick reinforced nylon (PA)
Gas lift cylinder	SGS Class 3 steel cylinder, 50mm outer diameter
Casters	60mm diameter dual-wheel mute polyurethane casters
Mechanism chassis	2.5mm thick steel plate tilt chassis
Seat upholstery fabric	320g/m² abrasion-resistant polyester fabric
Exposed structural finish	Matte black powder coating on metal components

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 adjusts seat height 100mm via under-seat lever
Headrest adjustment	40mm vertical height adjustment to support neck alignment
360-degree swivel	Full rotation around central gas lift axis for easy workspace access
Tilt function	Backrest tilts up to 130 degrees with single-position upright lock
Tilt tension adjustment	Tension knob under seat adjusts recline resistance for user weight
Mobility function	Dual-wheel casters roll smoothly on hard floors and low-pile carpet
Lumbar support	Contoured fixed lumbar zone aligns with natural lower back curve
Fixed armrest support	Fixed-height armrests provide stable forearm support at typing height
Front seat edge	Waterfall seat edge reduces pressure on back of thighs during long sitting
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.

Corporate open office workstations	Provides lumbar support and adjustability for 8-hour daily desk use
Home office and study spaces	Compact footprint fits standard desk layouts for remote work
Conference and meeting rooms	Swivel and mobility support easy collaboration during group discussions
Coworking and shared workspaces	Durable construction withstands frequent use by multiple users
Height-adjustable standing desk setups	Pneumatic seat height pairs with sit-stand desk height ranges
Student dormitory and study areas	Ergonomic support reduces fatigue during long study sessions
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	Defines dimensional safety requirements for office work chairs
EN 1335-2:2018	Covers strength, durability and safety performance for office chairs
EN 1335-3:2009	Specifies test methods for office chair structural stability

STANDARD S2

North America Purchasing & Inspection Reference * ANSI/BIFMA Standards

US and Canada office-furniture standards

ANSI/BIFMA X5.1-2017	Defines performance and safety requirements for general office chairs

STANDARD S3

Standards Applicable to China-Market Projects * GB Standards

Standards applicable to China-market projects

GB/T 3326-2016	Applies to furniture size measurement for office seating products
GB/T 10357.3-2013	Covers mechanical strength and durability test methods for office chairs
GB 28007-2011	Specifies safety requirements for general-purpose office chairs

Standardized tender description text

This product must meet the following technical requirements:
1. GB/T 3326-2016: Applies to furniture size measurement for office seating products;
2. GB/T 10357.3-2013: Covers mechanical strength and durability test methods for office chairs;
3. GB 28007-2011: Specifies safety requirements for general-purpose office chairs;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.

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Product Description

The High-Back Mesh Ergonomic Office Chair with Adjustable Headrest and Fixed Armrests (model ERG-OFCH-MSH-625, unbranded) is a purpose-built seating solution for long-duration desk use. Its form features a tall, contoured mesh back, padded fixed armrests, an independent height-adjustable headrest, and a classic five-star base supported by rolling casters, creating a clean, professional silhouette that blends function with understated, versatile styling suited to a wide range of interiors. Its unified design balances generous seating space with a compact footprint that avoids overcrowding surrounding work surfaces. The chair is engineered for long-term durability across high-use settings. Its backrest uses breathable woven polyester mesh stretched over a PA nylon frame reinforced with 20% glass fiber, to support air circulation during extended sitting. The seat cushion core uses high-density cold-cured molded foam supported by a molded plywood board below, for consistent, even weight distribution. Fixed armrests feature PP nylon frames topped with thick PU padding for soft forearm support, while the headrest combines a molded foam pad over a mesh insert for gentle neck contact. The reinforced nylon five-star base supports a SGS Class 3 steel gas lift, paired with dual-wheel mute polyurethane casters that roll smoothly across hard floors and low-pile carpet. Core functional features are tailored to user comfort: pneumatic seat height adjustment is controlled via an under-seat lever, the headrest adjusts vertically to support proper neck alignment, and the chair offers full 360-degree swivel for easy access to surrounding workspace items. A tilt function allows the backrest to recline with a single-position upright lock, paired with an under-seat tension knob to adjust recline resistance to match user weight. A fixed contoured lumbar zone aligns with the natural curve of the lower back to reduce postural strain over long sessions. The chair supports a recommended maximum user weight of 136 kg, with durable component ratings covering repeated use of the gas lift, tilt mechanism, and casters. This model fits a broad array of spaces, including corporate open office workstations, home offices and study rooms, conference and meeting areas, coworking and shared workspaces, setups paired with height-adjustable standing desks, and student dormitory study zones. For procurement planning, note that each unit ships in two cartons, with a reference assembly time of 40 minutes per set, and structured packaging dimensions that support efficient container loading for bulk orders.

High-Back Mesh Ergonomic Office Chair with Adjustable Headrest and Fixed Armrests Specifications

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