LIGHTSTAR swivel chair, vinyl cover, black. Supplied = partially assembled. Cover material = vinyl. Colour of covering = black. Frame colour = black. Frame material = plastic. Seat mechanism = synchronous mechanism. Frame design = with castors. Height adjustment range = 410 - 530 mm. Type of arm rests = without arm rests. Back rest height = 480 - 550 mm. Seat depth = 480 mm. Seat width = 480 mm. Shape of seat shell = flat seat with knee roll. Design of castors = soft castors for hard floors. Max. load = 110 kg. Period of use/day = up to 8 hours. Product type = office swivel chairs. Adjustable back rest. Flat seat with knee roll. Synchronous mechanism. Seat height adjustment. Hard floor castors. Classic, functional swivel chair with ergonomic back rest, height adjustable using incremental mechanism. Comfortable flat seat with knee roll. Synchronous mechanism for synchronous adjustment of seat and back rest angles, spring tension multiple for individual body weight, can be locked in mult