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Black Dual-Split Back Ergonomic Office Task Chair with Fixed Armrests and Lumbar Support Specifications

ET-DSFB-001

Code:28YEFDV1
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2026-08-28 14:47Popularity: 41
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ET-DSFB-001

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PRODUCT MODULE 01 / 06

Physical Dimensions

Automatic mm / inch conversion · Core engineering specifications

Overall dimensions (W x D x H)660 x 660 x 1100 mm
Seat width500 mm
Seat depth480 mm
Seat height adjustment range520 mm
Backrest height (from seat surface)600 mm
Five-star base footprint diameter700 mm
Fixed armrest height from seat surface220 mm
Caster diameter60 mm
Lumbar pad height from seat surface200 mm
Finished Seat Cushion Thickness90 mm
Backrest Padding Thickness70 mm
Lumbar Support Zone Height240 mm
Clear Width Between Armrests540 mm
PRODUCT MODULE 02 / 06

Weight, Load & Performance

Net weight / load capacity / users / durability

Recommended maximum user weight150 kg
Chair net weight13 kg
Seat cushion static load capacity200 kg
Caster rolling durability100000 cycles
Caster obstacle pass durability1000 cycles
Product warranty period5 years
Seat Foam Density / Rebound Reference45 kg/m³ / 65%
Back Foam Density Reference38 kg/m³
Upholstery Thickness / Abrasion Reference1.4 mm / 50000 cycles
Five-star Base Static Load ReferenceAcceptance target ≥120 kg; chair reference load 150 kg
PRODUCT MODULE 03 / 06

Materials & Structure

Core acceptance fields · Panels / hardware / frame / upholstery

Seat cushion upholsteryBlack woven polyester fabric, 0.8mm thickness
Seat cushion padding55 kg/m³ high-density molded polyurethane foam, 60mm thickness
Backrest padding40 mm thick high-resilience polyurethane foam, 45 kg/m³ density
Seat internal support plate12 mm thick plywood panel embedded under seat foam
Back frame and lumbar support frame30% glass fiber reinforced nylon (PA+GF30)
ArmrestsInjection-molded black polypropylene (PP) fixed loop structure
Five-star baseInjection-molded black nylon, 3.0mm wall thickness
Gas lift cylinderClass 4 steel gas lift, 2.5mm wall thickness, 50mm outer diameter
CastersBlack hard nylon swivel casters, twin-wheel design
Seam stitch pitch8 mm
Seat Internal Support Board Thickness14 mm bent plywood or equivalent support board
Backrest Internal Frame Thickness14 mm bent plywood/composite reinforced frame
PRODUCT MODULE 04 / 06

Functions & Adjustment

Adjustment / rotation / tilt / mobility / storage features

Seat height adjustmentPneumatic gas lift adjustment via right-side lever, 100mm total travel
Back tilt function3-position lockable synchro-tilt, maximum 121° recline angle
360-degree swivel rotationFull 360° horizontal rotation around central gas lift column
Rolling mobilitySmooth rolling on hard floors and low-pile carpet via five twin-wheel casters
Dual-split upper back supportIndependent padded back panels for bilateral upper back muscle pressure relief
Dedicated lumbar supportFixed contoured lumbar pad aligned to natural lower back lordosis
Fixed armrest supportRigid loop armrests providing stable forearm support during typing tasks
Tilt tension adjustmentRotary tension knob under seat adjusts recline resistance for different user weights
Recline Angle / Lock Reference125° with 3suggested lock positions
Tilt Tension User-weight RangeReference adjustment coverage 120 kg
Rotation / Mobility Configuration360° swivel with 5-caster multidirectional movement
PRODUCT MODULE 05 / 06

Packaging & Logistics

Verified carton / gross weight / assembly / loading data

Reference Package Count1 set / 2 cartons
Reference Assembly Time40 minutes per set
Reference Carton Dimensions850× 420× 720 mm
Reference Packaged Gross Weight23 kg/set
Reference Carton Volume0.26 m³/set
Indicative 20GP Loading135 sets at 85% space utilization
Indicative 40HQ Loading320 sets at 85% space utilization
PRODUCT MODULE 06 / 06

Applications & Usage

Recommended spaces / users / usage modes

Open plan office workstationsSuitable for long-duration daily computer work with lumbar and back support
Home office dedicated workspacesCompact footprint fits standard desk setups for remote work use
Meeting room and conference areasDurable construction supports frequent use by rotating meeting attendees
Shared co-working spacesSmooth mobility and simple adjustment work for varied user needs
Study rooms for students and teleworkersErgonomic support reduces fatigue during extended study or work sessions
Recommended Matching Desk Size2.4 m executive desk
Reference Daily Use Duration8 hours/day; confirm by ergonomic testing
STANDARD S1

EU Market Entry Requirements * EN Standards

EU Market Access Requirements* EN Standards

EN 1335-1:2020Applies to office chair dimensional safety and ergonomic performance requirements
EN 1335-2:2009Applies to office chair mechanical strength and durability performance requirements
EN 1021-1:2014Applies 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 X5.1-2017Applies to general-purpose office chair structural durability and load test requirements
STANDARD S3

Standards Applicable to China-Market Projects * GB Standards

Standards applicable to China-market projects

GB/T 3326-2016Applies to office chair dimensional accuracy and structural stability requirements
GB/T 10357.3-2013Applies to mechanical performance test methods for chair seating and back strength
GB 18584-2001Applies to indoor furniture formaldehyde emission limit requirements
Standardized tender description text
This product must meet the following technical requirements:
1. GB/T 3326-2016: Applies to office chair dimensional accuracy and structural stability requirements;
2. GB/T 10357.3-2013: Applies to mechanical performance test methods for chair seating and back strength;
3. GB 18584-2001: Applies to indoor furniture formaldehyde emission limit requirements;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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Product Description

The ET-DSFB-001 ergonomic office task chair is an unbranded seating solution designed for prolonged seated work, with a streamlined all-black aesthetic anchored by a five-star caster swivel base. Its defining visual feature is the dual-split backrest, paired with fixed loop armrests and a separate contoured lumbar support pad, creating a clean, functional silhouette that suits professional and residential work environments alike. At full assembly, the chair measures 660 mm wide, 660 mm deep, and 1100 mm tall, with a five-star base footprint spanning 700 mm to deliver stable, balanced support during movement. Its construction balances durability and seated comfort through carefully selected materials. The seat is upholstered in 0.8mm thick black woven polyester fabric, layered over 60mm thick, 55 kg/m³ high-density molded polyurethane foam, with a 12mm plywood internal support plate for structural rigidity. The backrest holds 40mm thick, 45 kg/m³ high-resilience polyurethane foam, supported by a frame built from 30% glass fiber reinforced nylon. Fixed loop armrests are formed from injection-molded black polypropylene, while the five-star base uses 3.0mm wall thickness injection-molded black nylon. A Class 4 steel gas lift with 2.5mm wall thickness and 50mm outer diameter connects the seat to the base, fitted with 60mm diameter twin-wheel hard nylon swivel casters. The entire chair weighs 13 kg, with a seat cushion static load capacity of 200 kg and recommended maximum user weight of 150 kg; casters are rated for 100,000 rolling cycles and 1,000 obstacle pass cycles, backed by a 5-year product warranty. Practical functions are tailored to reduce work-related fatigue. A right-side lever controls pneumatic seat height adjustment with 100mm of total travel, reaching a maximum seat height of 520 mm, with fixed armrests positioned 220 mm above the seat for stable forearm support during typing. The synchro-tilt mechanism offers 3 lockable positions, with a maximum 121° recline angle, while full 360-degree horizontal swivel and smooth-rolling casters support easy movement across hard floors and low-pile carpet. The independent dual-split upper back panels relieve pressure on bilateral upper back muscles, while the fixed contoured lumbar pad aligns to the natural lower back curve for consistent support. This chair is suitable for a range of settings, including open plan office workstations for daily long-duration computer work, compact home office spaces for remote work, high-traffic meeting and conference rooms, flexible co-working spaces serving diverse users, and study rooms for students or teleworkers, with a recommended pairing with 2.4 m executive desks. For procurement, note that each unit ships in 2 cartons, with a packaged gross weight of 23 kg per set and total carton volume of 0.26 m³. Assembly takes 40 minutes per unit, and 135 sets can be loaded in a 20GP container at 85% space utilization, supporting bulk order planning for large workspace fit-outs.

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