Support Synchro swivel office chair•Infinitely variable seat height adjustment with TOPLIFT (TÜV tested), in accordance with DIN EN 1335 Parts 1-3•Ergonomically shaped backrest, height can be continuously adjusted in the wedge raster mechanism and mechanismSynchronous mechanism with spring force adjustment for seat and backrest wedge adjustment, individually adjustable according to body weight•Special permanent ergonomic seat disc contact•Upholstery made of 100% polypropylene (flame retardant finish)•Secondary frame consisting of a stable polyamide base, black, with load-dependent double braked safety castors for soft floors Note: Optional accessories at extra cost•Armrests: Type SU, rigid/U2, height adjustable•Hard floor roller for wood, parquet, tiles and stone, 10 mm pin, roller Ø 50mm< br /> •Roller coor standard 10mm
