General: Foam Type: Moulded Foam / Polyurethane Foam Foam Density: 50 kg/m³ / 24 kg/m³ Frame Construction: Steel (Diameter: 19 mm) Seat Cover Material: Fabric Color Versions: Black/Grey, Black/Blue, Black/Red, Black/Green Adjustable Armrests: 3D Armrest Pad Size (L x W): 25 x 9 cm Mechanism: Conventional Tilt Tilt Lock: ? Adjustable Tilt Angle: 3° - 18° Gas Lift Piston: Class-4 Seat Back Style: High-back Adjustable Back Angle: 90° - 160° Headrest & Lumbar Cushion: ? Headrest & Lumbar Cushion Cover Material: Fabric Five-Star Base: Steel Five-Star Base Wheel Size: 60 mm Assembly Required: ? Safety Certifications: Chair (General): DIN EN 1335-1/2/3 Gas Lift Piston: DIN 4550 Weight & Dimensions: Seating Size (W x D): 39.5 x 50 cm Maximum Seating Height: 58.5 cm Minimum Seating Height: 49 cm Maximum Armrest Height: 35.5 cm Minimum Armrest Height: 28.5 cm Backrest Height: 83 cm Backrest Shoulder Width: 57 cm Package Size (L x W x H): 86 x 70 x 33 cm Max. Height of Recommended User: 185 cm Weight: 20.8 kg Max. Weight Capacity: 110 kg