DXRacer Iron Series DOH/IS166/N office chair X large PC gaming chair computer chair executive chair ergonomic rocker (BLACK) Quality and Security All the accessories have passed 72 strict quality tests. Imported Hydraulic unit The hydraulic unit is imported from Germany and passes stringent SGS and exceeds International standards. Adjustable system The height and angle of the chair can be adjusted to any degree. Full-size frame The DXRACER chair has a full size frame inside. We adhere to strict quality controls to bring you the ultimate in comfort. Lifetime warranty on frame, 24-month warranty on parts 90 4D Arms Multi-functional Mechanism Strong Aluminium Base Leather Style Vinyl and PU 3&#034; PU Casters