Name: Black High-Back Mesh Ergonomic Office Chair with Retractable Footrest
Brand: Bolongkeli Smart Furniture
SKU: 5211TP

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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)	720 × 720 × 1420 mm
Overall assembled dimensions	720 x 720 x 1420 mm
Seat height adjustment range	540 mm
Seat cushion dimensions	500 x 500 x 60 mm
Backrest width	490 mm
Five-star base diameter	700 mm
Headrest dimensions	320 x 180 mm
Footrest extension length	460 mm
Armrest height above seat	280 mm
Seat depth	500 mm
Caster diameter	65 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.

Maximum recommended user weight	250 kg
Chair net weight	25 kg
Recommended user height range	1830 mm
Seat foam density	50 kg/m³
Seat foam rebound rate	60%
Gas lift cycle rating	120000 cycles
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

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	Tight-woven breathable polyester mesh
Seat cushion core	High-density molded polyurethane foam
Seat upholstery	Breathable mesh over foam pad
Structural frame	Nylon reinforced with 30% glass fiber
Armrest pads	Soft polyurethane (PU) padded surfaces
Armrest support posts	Injection-molded nylon with height adjustment locks
Five-star base	2.0mm thick powder-coated steel
Retractable footrest	1.5mm thick steel tube with PP foot pad
Gas lift cylinder	SGS/Class 3 certified steel gas lift
Casters	65mm diameter nylon twin-wheel mute casters
Seat mechanism chassis	3.0mm thick steel synchro-tilt plate
Headrest frame	Injection-molded PP with mesh cover

PRODUCT MODULE 04 / 06

Functions & Adjustment

Adjustment / rotation / tilt / mobility / storage features

Data source: Functional configuration; the supplier specification prevails.

Swivel function	360-degree full rotation around central gas lift
Seat height adjustment	100mm vertical travel via pneumatic gas lift
Recline function	140-degree maximum backrest recline with 4 locking positions
Armrest adjustment	4D adjustment: 80mm height, 50mm front/back slide, 30mm width, 30° rotation
Headrest adjustment	100mm height travel, 20° angle rotation, 50mm depth slide
Lumbar support adjustment	50mm height travel, 40mm depth adjustment
Footrest operation	Retractable pull-out design, locks in extended position for reclined rest
Tilt tension control	Adjustable knob modulates recline resistance to match user weight
Seat depth adjustment	50mm front/back seat slide to support different thigh lengths
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	Suitable for 8-hour daily desk work with adjustable ergonomic support
Home office spaces	Fits standard height home desks with compact footprint and recline function
Manager private offices	Professional black finish matches executive office furniture sets
Co-working flexible seating	Adjustable features accommodate varied user heights and preferences
Short-break rest use	Retractable footrest and 140° recline support short rest periods during workdays
User height compatibility	Supports adult users between 160cm and 183cm for proper ergonomic fit
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 requirement	EN 1335:2020
Office chair structural strength	EN 1728:2014
Furniture flammability	EN 1021:2014

STANDARD S2

North America Purchasing & Inspection Reference * ANSI/BIFMA Standards

US and Canada office-furniture standards

General purpose office chairs	ANSI/BIFMA X2017
Office chair casters	ANSI/BIFMA X2017Clause 13
Gas lift safety	ANSI/BIFMA X2017Clause 8
Caster rolling durability	100000 cycles
Static load rating for five-star base	1136 kg

STANDARD S3

Standards Applicable to China-Market Projects * GB Standards

Standards applicable to China-market projects

Office chair safety requirement	GB/T 38733
Formaldehyde emission limit	GB 18584
Furniture mechanical stability	GB/T 10357.2

Standardized tender description text

This product must meet the following technical requirements:
1. Office chair safety requirement: GB/T 38733;
2. Formaldehyde emission limit: GB 18584;
3. Furniture mechanical stability: GB/T 10357.2;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.

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Product Description

The Black High-Back Mesh Ergonomic Office Chair with Retractable Footrest from Bolongkeli Smart Furniture, model ERG-MESH-FR-01, delivers tailored support for extended seated use across professional and residential settings. Its streamlined high-back silhouette features a structured five-star base, with a cohesive black finish that complements a wide range of interior design schemes. The layout prioritizes intuitive adjustability, with all control points positioned within easy reach for seamless transitions between focused work and rest positions. Built for consistent long-term use, the chair pairs a tight-woven breathable polyester mesh backrest with a seat constructed from high-density molded polyurethane foam topped with breathable mesh upholstery, balancing airflow and cushioned support. Its structural frame is crafted from nylon reinforced with 30% glass fiber, while soft polyurethane-padded armrests mount to height-adjustable injection-molded nylon support posts. The five-star base is formed from powder-coated steel, supporting a Class 3 certified steel gas lift, and the retractable footrest uses steel tube construction with a smooth PP foot pad. The chair supports 360-degree swivel and smooth rolling movement across floor surfaces, with pneumatic seat height adjustment, a 140-degree maximum backrest recline with four locking positions, and fully customizable support components: 4D adjustable armrests, a multi-adjustable headrest, and height- and depth-tunable lumbar support. The pull-out footrest locks securely when extended to support relaxed reclining during short workday breaks. This model is well suited for corporate open office workstations, supporting 8 hours of daily desk work with targeted ergonomic alignment. It also fits standard-height home office desks with its space-efficient footprint, complements executive furnishing sets in private manager offices, and adapts to diverse user needs in co-working spaces. It accommodates adult users up to 183cm tall for proper ergonomic fit. Procurement teams should note the chair ships in two cartons per set, with a straightforward assembly process, and supports high-volume container loading for large-scale furnishing projects. When planning layouts, account for the chair’s full assembled footprint to ensure adequate clearance for recline and swivel movement around work surfaces.

Black High-Back Mesh Ergonomic Office Chair with Retractable Footrest Specifications

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