TOPSTAR office chair Open Point. Adjustable back depth: no. Armrests: included. Adjustable back height: yes. Body balance system: no. Number of castors: 5. Recommended use: 8 hours/day. Fire retardant: no. Adjustable armrest: yes. Load capacity: 110 kg. Lockable armrest: yes. Lockable tilt mechanism: yes. Material: polypropylene. Seat material: polypropylene. Permanent contact: no. Real leather: no. Adjustable seat angle: yes. Adjustable seat depth: yes. Lumbar support: no. Stackable: no. Chair type: executive chair. Base type: star base, metal. Seat depth: 460 mm. Seat height: 460 mm. Backrest height: 570 mm. Adjustable seat height: max. 520 mm. Dimensions: 1090 x 460 x 460 mm (h x w x d). Colour: black.