TO-STRIKE 9248 office swivel chair, with 4D adjustable armrests, black. Supplied = flat pack. Cover material = polyester. Colour of covering = black. Back rest colour = black. Frame colour = black. Frame material = plastic. Seat mechanism = synchronous mechanism with sliding seat. Frame design = with castors. Height adjustment range = 410 - 520 mm. Type of arm rests = with arm rests. Back rest height = 580-650 mm. Fittings = counter pressure setting. Seat depth = 400 - 450 mm. Seat width = 480 mm. Shape of seat shell = flat seat, sliding seat. Conforms to = DIN EN 1335 part 1 - 3, DIN EN 12527+DIN EN 12529. Design of castors = universal castors for soft and hard floors. Max. load = 125 kg. Product type = office swivel chairs. High upholstered back rest with integrated lumbar support. 4D adjustable arm rests with PU padding. Ergonomically upholstered seat with depth adjustment. Synchronous mechanism with 3 locking options. Infinitely variable spring tension adjustment. COMFORT PRO SK 9248 - the test winning chair. Rated GOOD (2.0) by Stiftung Warentest in September 2021. Supplied flat pack - easy self-assembly. The TrendOffice company is part of the Dauphin HumanDesign®-Group .