Gray Upholstered Mid-Back Conference Swivel Chair (model OF-MB-PA-550-GRY) is listed under Executive Boss Chair. Dimensions: 630 × 630 × 1010 mm. Materials: Gray polyurethane leather over 80 mm foam and structural seat board; exact leather grade needs BOM confirmation. Load capacity: 1136 kg. Product Features: mid-back,chair,swivel,base,upholstered,seating,polished,metal,mobile,casters. This page consolidates 6 groups of specifications and GB / EN / ANSI/BIFMA standard references, with metric and imperial units. 1 supplier(s) are listed and you can request a quote online.
| Brand | JIULONGYOUSHENG | Model | OF-MB-PA-550-GRY |
| Overall dimensions (W × D × H) | 630 × 630 × 1010 mm | Finished Seat Cushion Thickness | 90 mm |
| Backrest Padding Thickness | 70 mm | Lumbar Support Zone Height | 240 mm |
| Clear Width Between Armrests | 540 mm | Recommended user weight capacity | 150 kg |
| Net weight | 18 kg | Recommended user height range | 160 to 190 cm |
| Seat foam density | 45 kg/m3 | Back foam density | 35 kg/m3 |
| Seat foam thickness | 80 mm | Back foam thickness | 60 mm |
| Foam rebound rating | 40% | Fabric abrasion acceptance target | 50,000 Martindale cycles |
| Base static-load acceptance target | 1136 kg | Seat upholstery | Gray polyurethane leather over 80 mm foam and structural seat board; exact leather grade needs BOM confirmation |
| Back upholstery | Tailored gray polyurethane leather face with vertical center seam over padded shell | Seat cushion | 80 mm polyurethane foam at 45 kg/m3 density target on a 12 mm structural board |
| Back cushion | 60 mm polyurethane foam at 35 kg/m3 density target over a molded back shell | Internal seat frame | 12 mm bent plywood or engineered-wood board with welded steel reinforcement brackets |
| Back frame | Molded polypropylene or plywood shell with steel hinge-to-seat brackets | Arm pads | Black polyurethane pads with steel or engineered-wood insert under each pad |
| Arm supports | Polished chrome-plated steel or aluminum vertical supports with black mounting caps | Gas lift | 50 mm chrome-plated steel telescoping gas lift, class 4 procurement grade |
| Mechanism | Black steel tilt mechanism with 2.5 mm plate target and side height lever | Five-star base | Polished aluminum-alloy or chrome-plated steel five-star base with 2.5 mm wall target |
| Casters | 60 mm black polyurethane twin-wheel casters with steel stems and black housing | Seat height adjustment | Pneumatic lever raises and lowers the seat over an 80 mm stroke |
| Swivel function | 360-degree swivel around the central gas-lift axis | Tilt movement | Synchro or center-tilt mechanism with 12-degree rearward recline target |
| Tilt lock | Lockable upright position and 3-position recline selection target | Tilt tension control | Under-seat knob adjusts resistance for users up to 150 kg |
| Mobility | Five 60 mm twin-wheel casters provide rolling movement on hard floors or low-pile carpet | Arm support | Fixed-height armrests support forearms at 230 mm above the seat and carry a 45 kg vertical load target |
| Back support | Continuous mid-back panel provides thoracic and lower-back support without adjustable lumbar | Color option count | 1 visible gray color option, with 4 standard leather colors recommended for procurement range |
| Warranty target | 5 years for frame and mechanism, 2 years for upholstery and casters | Assembly requirement | Base, gas lift, seat/back module, and arm components assemble in 25 minutes |
| Recline Angle / Lock Reference | 125° with 3suggested lock positions | 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 |
| Private executive office | Pairs with a 2000 mm executive desk where a polished gray chair supports formal desk work | Conference room | Suitable around 1600 mm meeting tables because caster mobility and 360-degree swivel aid entry and discussion |
| Manager workstation | Recommended for users performing 6 hours of desk work with a separate monitor and keyboard | Home office | Fits a private study or professional home office with hard flooring or low-pile carpet |
| Reception or interview setting | Usable behind a reception desk or in interview rooms where appearance and easy repositioning matter | Procurement configuration | Order in sets of 20with matching gray upholstery and hard-floor casters for meeting-room standardization |
| Recommended table height | Use with work surfaces 760 mm high to align the 230 mm armrest height with standard desk edges | Recommended Matching Desk Size | 2.4 m executive desk |
| Time | Field | Original Value | Corrected Value | Note / Status |
|---|---|---|---|---|
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Automatic mm / inch conversion · Core engineering specifications
Data source: Structured from factory data; final measured values prevail.
| Overall dimensions (W × D × H) | 630 × 630 × 1010 mm | |
|---|---|---|
| Finished Seat Cushion Thickness | 90 mm | |
| Backrest Padding Thickness | 70 mm | |
| Lumbar Support Zone Height | 240 mm | |
| Clear Width Between Armrests | 540 mm |
Net weight / load capacity / users / durability
Data source: Product performance data; verify exact test conditions before procurement.
| Recommended user weight capacity | 150 kg | |
|---|---|---|
| Net weight | 18 kg | |
| Recommended user height range | 160 to 190 cm | |
| Seat foam density | 45 kg/m3 | |
| Back foam density | 35 kg/m3 | |
| Seat foam thickness | 80 mm | |
| Back foam thickness | 60 mm | |
| Foam rebound rating | 40% | |
| Fabric abrasion acceptance target | 50,000 Martindale cycles | |
| Base static-load acceptance target | 1136 kg |
Core acceptance fields · Panels / hardware / frame / upholstery
Data source: Subject to the factory material list and inspection report.
| Seat upholstery | Gray polyurethane leather over 80 mm foam and structural seat board; exact leather grade needs BOM confirmation | |
|---|---|---|
| Back upholstery | Tailored gray polyurethane leather face with vertical center seam over padded shell | |
| Seat cushion | 80 mm polyurethane foam at 45 kg/m3 density target on a 12 mm structural board | |
| Back cushion | 60 mm polyurethane foam at 35 kg/m3 density target over a molded back shell | |
| Internal seat frame | 12 mm bent plywood or engineered-wood board with welded steel reinforcement brackets | |
| Back frame | Molded polypropylene or plywood shell with steel hinge-to-seat brackets | |
| Arm pads | Black polyurethane pads with steel or engineered-wood insert under each pad | |
| Arm supports | Polished chrome-plated steel or aluminum vertical supports with black mounting caps | |
| Gas lift | 50 mm chrome-plated steel telescoping gas lift, class 4 procurement grade | |
| Mechanism | Black steel tilt mechanism with 2.5 mm plate target and side height lever | |
| Five-star base | Polished aluminum-alloy or chrome-plated steel five-star base with 2.5 mm wall target | |
| Casters | 60 mm black polyurethane twin-wheel casters with steel stems and black housing |
Adjustment / rotation / tilt / mobility / storage features
Data source: Functional configuration; the supplier specification prevails.
| Seat height adjustment | Pneumatic lever raises and lowers the seat over an 80 mm stroke | |
|---|---|---|
| Swivel function | 360-degree swivel around the central gas-lift axis | |
| Tilt movement | Synchro or center-tilt mechanism with 12-degree rearward recline target | |
| Tilt lock | Lockable upright position and 3-position recline selection target | |
| Tilt tension control | Under-seat knob adjusts resistance for users up to 150 kg | |
| Mobility | Five 60 mm twin-wheel casters provide rolling movement on hard floors or low-pile carpet | |
| Arm support | Fixed-height armrests support forearms at 230 mm above the seat and carry a 45 kg vertical load target | |
| Back support | Continuous mid-back panel provides thoracic and lower-back support without adjustable lumbar | |
| Color option count | 1 visible gray color option, with 4 standard leather colors recommended for procurement range | |
| Warranty target | 5 years for frame and mechanism, 2 years for upholstery and casters | |
| Assembly requirement | Base, gas lift, seat/back module, and arm components assemble in 25 minutes | |
| Recline Angle / Lock Reference | 125° with 3suggested lock positions |
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 |
Recommended spaces / users / usage modes
Data source: Recommended applications based on product form and category.
| Private executive office | Pairs with a 2000 mm executive desk where a polished gray chair supports formal desk work | |
|---|---|---|
| Conference room | Suitable around 1600 mm meeting tables because caster mobility and 360-degree swivel aid entry and discussion | |
| Manager workstation | Recommended for users performing 6 hours of desk work with a separate monitor and keyboard | |
| Home office | Fits a private study or professional home office with hard flooring or low-pile carpet | |
| Reception or interview setting | Usable behind a reception desk or in interview rooms where appearance and easy repositioning matter | |
| Procurement configuration | Order in sets of 20with matching gray upholstery and hard-floor casters for meeting-room standardization | |
| Recommended table height | Use with work surfaces 760 mm high to align the 230 mm armrest height with standard desk edges | |
| Recommended Matching Desk Size | 2.4 m executive desk |
EU Market Access Requirements* EN Standards
| EN 1335-1:2020 | Use for office-chair dimensional safety and design requirements for the selected seat, back, arm, and clearance dimensions | |
|---|---|---|
| EN 1335-2:2018 | Use for office-work-chair safety, stability, and structural verification in purchase acceptance | |
| EN 1335-3:2020 | Use for office-work-chair test methods, including strength, durability, and backrest verification | |
| EN 1022:2018 | Use for domestic and contract seating stability testing when evaluating front, rear, and side tipping |
US and Canada office-furniture standards
| ANSI/BIFMA X5.1-2017 R2022 | Use for general-purpose office-chair safety, strength, durability, and dimensional acceptance testing | |
|---|---|---|
| BIFMA X5.1 Caster Test | Require caster durability, floor compatibility, and retention verification for the 60 mm twin wheels |
Standards applicable to China-market projects
| GB/T 3324-2024 | Use for general wooden furniture dimensional, workmanship, and inspection requirements where wood board is used in the seat or back | |
|---|---|---|
| GB/T 10357.3-2013 | Use for chair strength and durability test methods in purchasing inspection | |
| GB 18584-2001 | Use for indoor decorative wood-based furniture limited formaldehyde emission verification if engineered wood is present | |
| GB/T 2960-2019 | Use for office-furniture terminology and product-attribute consistency on technical drawings |
This product must meet the following technical requirements: 1. GB/T 3324-2024: Use for general wooden furniture dimensional, workmanship, and inspection requirements where wood board is used in the seat or back; 2. GB/T 10357.3-2013: Use for chair strength and durability test methods in purchasing inspection; 3. GB 18584-2001: Use for indoor decorative wood-based furniture limited formaldehyde emission verification if engineered wood is present; 4. GB/T 2960-2019: Use for office-furniture terminology and product-attribute consistency on technical drawings; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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