"Find your ideal position with this fully adjustable office chair, featuring a backrest that reclines from 90° to 135°, adjustable lumbar support, versatile 4D armrests, and a 2D headrest. Designed for ergonomic support, it follows your spine’s curve to reduce discomfort during extended tasks. The durable nylon mesh keeps you cool, and the high-density foam seat offers balanced comfort for long hours. Rubber castors move quietly and safeguard your floors, while a robust metal base holds up to 150 kg. Assembly is straightforward with included tools and clear instructions.Notes:- Please ensure all screws are tightened securely to prevent potential injury.- Use the product on a flat, stable surface to avoid tipping.Parameters:- Product Dimensions: 27.6""D x 27.6""W x (44-53.5)""H (70 x 70 x 112-136 cm)- Net Weight: 39.5 lb (17.9 kg)- Max. Static Weight Capacity: 330 lb (150 kg)- Material: Steel, Non-Woven Fabric, Poly-Cotton Fabric, Foam, Plywood, PP (Polypropylene) Plastic- Color: BlackPackage List:- 1 x Desk Chair."