TOPSTAR Mesh Office Chair. Armrest: Optional. Assembly: Assembly required. Adjustable backrest: height. Adjustable seat depth: yes. Seat/backrest material: mesh. Chair type: office chair. Fire resistance: no. Frame colour: black. GS tested safety: yes. Height adjustable: Height adjustable. Includes: 1 office chair. Special Lumbar Support: none. Material: polyamide. Frame material: plastic. Number of swivel wheels: 5. Recommended use: 8 hours/day. Adjustable seat angle: no. Adjustable seat depth: no. Self-assembly: yes. Stackable: no. Continuously tiltable backrest: yes. Base type: star base, plastic. Mechanism type: synchronous mechanism. Backrest height: 580 mm. Seat depth: 480 mm. Adjustable seat height (maximum): 570 mm. Adjustable seat height (minimum): 420 mm. Seat width: 480 mm. Backrest width: 560 mm. Dimensions: 580 x 480 x 480 mm (h x w x d). Colour: black.