| Submitted | Field | Original | Note / Status | |
|---|---|---|---|---|
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Automatic mm / inch conversion · Core engineering specifications
| Overall dimensions | 550 x 580 x 980 mm | |
|---|---|---|
| Seat cushion dimensions | 450 x 470 mm | |
| Maximum adjustable seat height | 590 mm | |
| Minimum adjustable seat height | 390 mm | |
| Maximum adjustable backrest height | 950 mm | |
| Seat depth adjustment travel | 80 mm | |
| Five-star base diameter | 620 mm | |
| Caster diameter | 50 mm | |
| Armrest height above seat | 180 mm | |
| Backrest width | 420 mm | |
| Headrest dimensions | 180 x 100 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
| Maximum static load capacity | 300 kg | |
|---|---|---|
| Recommended user weight | 80 kg | |
| Net weight | 15 kg | |
| Gas lift fatigue cycle rating | 100000 cycles | |
| Fabric abrasion resistance | 40000 cycles | |
| Seat foam density | 45 kg/m³ | |
| Seat foam thickness | 60 mm | |
| 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 |
Core acceptance fields · Panels / hardware / frame / upholstery
| Upholstery fabric | Stain-resistant breathable knitted fabric | |
|---|---|---|
| Cushion fill | High-resilience molded polyurethane foam | |
| Backrest fill | High-density polyurethane foam | |
| Structural frame | High-strength ABS and PP plastic | |
| Lift column | Cold-rolled steel gas lift | |
| Chassis plate | 2.5mm thick reinforced steel | |
| Five-star base | Reinforced nylon composite | |
| Casters | PU-wheeled gravity self-locking casters | |
| Armrest pads | Soft TPE padded surface | |
| Footrest platform | Textured non-slip PP surface | |
| Seat Internal Support Board Thickness | 14 mm bent plywood or equivalent support board | |
| Backrest Internal Frame Thickness | 14 mm bent plywood/composite reinforced frame |
Adjustment / rotation / tilt / mobility / storage features
| Seat height adjustment | Gas-assisted lift with 200mm vertical travel | |
|---|---|---|
| Seat depth adjustment | Forward/back sliding with 80mm travel | |
| Caster locking | Gravity-activated automatic lock | |
| Back support design | Dual-lobe split back option | |
| Headrest support | Height-adjustable padded oval headrest | |
| Seam construction | 8mm stitch pitch on upholstery | |
| Anti-pinch protection | Covered chassis and lift column gaps | |
| 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 |
Verified carton / gross weight / assembly / loading data
| 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
| Home study area | For children 12 years completing homework, reading or online learning tasks | |
|---|---|---|
| Paired with height-adjustable study desk | Matches 760 mm desk height for upright seated posture | |
| Private tutoring classrooms | Durable, adjustable seating for multi-age student use in small class settings | |
| Reading nooks | Provides postural support during extended independent reading sessions | |
| Color-matched kids’ rooms | Available in pink, blue, green to coordinate with children’s bedroom decor | |
| 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 1729-1:2015 | Applicable for educational furniture chair strength and stability requirements | |
|---|---|---|
| EN 12520:2015 | Applicable for domestic furniture seating strength, durability, safety |
US and Canada office-furniture standards
| ANSI/BIFMA X5.1-2017 | Applicable for office chair durability and safety performance benchmarks | |
|---|---|---|
| BIFMA G1-2013 | Applicable for ergonomic seating guideline reference for posture support |
Standards applicable to China-market projects
| GB 28007-2011 | Applicable for children’s furniture general safety requirements | |
|---|---|---|
| GB 28481-2012 | Applicable for restricted harmful substances in plastic furniture | |
| GB/T 3326-2016 | Applicable for furniture desk/chair dimension measurement standards |
This product must meet the following technical requirements: 1. GB 28007-2011: Applicable for children’s furniture general safety requirements; 2. GB 28481-2012: Applicable for restricted harmful substances in plastic furniture; 3. GB/T 3326-2016: Applicable for furniture desk/chair dimension measurement standards; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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