-- https://eu.akracing.com/products/akracing-office-series-obsidian-computer-chair Features: Adjustable Armrests: 4D Mechanism Type: Standard Mechanism Adjustable Tilt Angle: 3-18° Tilt Lock: Yes Tilt Angle Lock: No Recline angle: 180° Gas Lift Class: Class 4 gaslift Adjustable Back Angle: Yes Adjustable Lumbar Cushion: Yes Adjustable Headrest: Yes Meets/Exceeds ANSI/BIFMA Standards: Yes Warranty Length: 5 years Materials: Frame Material: Metal Frame Coating: Anti corrosive black paint Chair Cover Material: Premium PU leather on front and back Foam Type: High Density Mould Shaping Foam Foam Density: 55 kg/m³ (seat) 50 kg/m³ (back) Base Type: High-tensile aluminum base Size Recommendation For maximum comfort: Height: 167-200 cm Weight: 65-125 kg BMI: Not to exceed 32 Caster Size: 6 cm Weight Capacity: 150 kg Net Weight: 22.5 kg lbs Gross Weight: 27 kg