| Submitted | Field | Original | Note / Status | |
|---|---|---|---|---|
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Automatic mm / inch conversion · Core engineering specifications
| Overall dimensions | 680 x 850 x 920 mm | |
|---|---|---|
| Seat height | 460 mm | |
| Seat width | 580 mm | |
| Seat depth | 500 mm | |
| Backrest height from seat | 450 mm | |
| 4-star base span diameter | 680 mm | |
| Central support stem diameter | 50 mm | |
| Seat edge thickness | 80 mm | |
| Bentwood shell thickness | 12 mm | |
| Base prong length from center | 320 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
| Recommended static load capacity | 150 kg | |
|---|---|---|
| Product net weight | 28 kg | |
| Seat foam density | 45 kg/m³ | |
| Backrest foam density | 35 kg/m³ | |
| Seat foam thickness | 80 mm | |
| Backrest foam thickness | 50 mm | |
| Upholstery abrasion resistance (Martindale) | 50000 double rubs | |
| Swivel rotation range | 360 degrees | |
| Seam stitch pitch | 30 mm | |
| Seat Foam Density / Rebound Reference | 45 kg/m³ / 65% |
Core acceptance fields · Panels / hardware / frame / upholstery
| Outer structural shell | 12mm thick bent plywood with walnut wood veneer finish | |
|---|---|---|
| Seat cushion core | High-density polyurethane foam, density 45 kg/m³, 40% rebound rating | |
| Backrest cushion core | Medium-density polyurethane foam, density 35 kg/m³, 35% rebound rating | |
| Upholstery cover | Dark grey/charcoal polyurethane (PU) faux leather, 1.2mm thickness | |
| Central swivel stem | Polished chrome-plated steel, 2mm wall thickness, 50mm diameter | |
| 4-star base structure | Polished chrome-plated steel, 3mm material thickness, flat prong design | |
| Floor glides | 8mm diameter felt-tipped non-scuff glides, one per base prong end | |
| Swivel bearing assembly | Steel ball bearing swivel mechanism, rated for 30000 rotation cycles | |
| Upholstery stitching | High-tenacity polyester thread, matched dark color, double-stitched panel seams | |
| Seat Internal Support Board Thickness | 14 mm bent plywood or equivalent support board | |
| Backrest Internal Frame Thickness | 14 mm bent plywood/composite reinforced frame | |
| Gas-lift Engineering Specification | Recommended Class 4; outer tube 50 mm; stroke 100 mm |
Adjustment / rotation / tilt / mobility / storage features
| Swivel motion | Full 360-degree rotation on central steel ball bearing, with passive return-to-center alignment | |
|---|---|---|
| Seating posture | Fixed 18-degree reclined back angle, no adjustable tilt or recline mechanism | |
| Height setting | Fixed 460mm seat height, no gas lift height adjustment | |
| Mobility | Stationary positioning with 360-degree swivel only, no rolling casters | |
| Seating access | Armless open design allows access from both sides and front | |
| Floor protection | Felt glides prevent scratching of hard wood, tile and polished concrete floors | |
| Cleaning access | Smooth non-porous upholstery surface allows spot cleaning with mild detergent | |
| Assembly requirement | Knock-down construction requiring attachment of base assembly to seat shell via central stem bolt | |
| Backrest recline angle from vertical | 18 degrees | |
| Recline Angle / Lock Reference | 125° with 3suggested lock positions | |
| Tilt Tension User-weight Range | Reference adjustment coverage 120 kg | |
| Height Adjustment Stroke | 100 mm continuous travel |
Verified carton / gross weight / assembly / loading data
| Carton count | 1 unit | |
|---|---|---|
| Shipping carton dimensions | 750 x 700 x 700 mm | |
| Gross shipping weight | 31 kg | |
| Shipping volume per unit | 0.37 CBM | |
| Assembly time per unit | 20 minutes | |
| 20ft GP container loading quantity | 72 units | |
| 40ft HQ container loading quantity | 176 units | |
| Packaging protection | 5mm thick corrugated carton with 20mm EPS foam edge protection, plastic dust cover over upholstered shell | |
| Reference Package Count | 1 set / 2 cartons | |
| Reference Assembly Time | 40 minutes per set |
Recommended spaces / users / usage modes
| Office reception and waiting areas | Fixed relaxed posture and polished professional finish create a welcoming seating option for corporate lobbies, with swivel function supporting easy conversation orientation | |
|---|---|---|
| Modern residential living rooms and home studies | Compact footprint and walnut wood + dark upholstery palette complement mid-century and contemporary interior design, suited for casual reading or guest seating | |
| Hotel lobby and guest room lounge zones | Durable contract-grade construction and low-maintenance upholstery suit high-traffic hospitality environments, with 360-degree swivel improving guest convenience | |
| Co-working and shared workspace breakout areas | Armless open design supports flexible short-term seating for collaboration breaks, with stable fixed base suitable for daily multi-user use | |
| Design showroom and exhibition display areas | Sleek curved bentwood silhouette and streamlined base create a strong visual focal point for furniture retail or trade show displays | |
| Executive office informal meeting zones | Sophisticated aesthetic matches premium office interiors, providing secondary seating for short informal discussions away from the formal desk area | |
| Recommended Matching Desk Size | 2.4 m executive desk | |
| Reference Daily Use Duration | 8 hours/day; confirm by ergonomic testing |
EU Market Access Requirements* EN Standards
| EN 16139:2013 | Strength, durability and safety requirements for non-domestic seating, applicable for contract reception and lounge area use | |
|---|---|---|
| EN 1022:2018 | Seating stability test standard, verifying stability of 4-star swivel base under normal and offset seating loads | |
| EN 12520:2015 | Furniture hardware strength and durability requirements, applicable to swivel bearing and base connection components |
US and Canada office-furniture standards
| North America procurement and testing reference | ANSI/BIFMA X5.4 Public and Lounge Seating |
|---|
Standards applicable to China-market projects
| GB/T 3324-2017 | General technical requirements for wooden furniture, applicable to structural safety of bent plywood shell frame and finish durability | |
|---|---|---|
| GB/T 16799-2008 | Performance requirements for polyurethane leather used in furniture upholstery, covering abrasion, color fastness and tear strength | |
| GB/T 35607-2017 | Green product assessment standard for furniture, recommended for evaluation of formaldehyde and VOC emissions from wood and foam components | |
| GB 28007-2011 | Safety standard for children's furniture if specified for family use, requiring rounded edges and no sharp points on metal base components |
This product must meet the following technical requirements: 1. GB/T 3324-2017: General technical requirements for wooden furniture, applicable to structural safety of bent plywood shell frame and finish durability; 2. GB/T 16799-2008: Performance requirements for polyurethane leather used in furniture upholstery, covering abrasion, color fastness and tear strength; 3. GB/T 35607-2017: Green product assessment standard for furniture, recommended for evaluation of formaldehyde and VOC emissions from wood and foam components; 4. GB 28007-2011: Safety standard for children's furniture if specified for family use, requiring rounded edges and no sharp points on metal base components; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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