OF1556 Features: * Contemporary style * Breathable mesh backrest and leather seat * Seat swivels 360 degrees * Gas lift seat height adjustment * Adjustable height arms * Synchronized seat and back adjustment * Tilt tension adjusts easily * Built-in lumbar support * Perfect for general office use * Back size: 19.5"" x 30.5"" Options: * Optional hard floor casters or glides available Assembly Instructions: * Assembly required Dimensions: * Seat size: 18.5"" - 21.5"" H x 20"" W x 19.25"" D * Seat thickness: 2.3"" * Base dimensions: 28.5"" * Arm height from floor: 26.25"" - 31.5"" H x 26.75"" W * Overall dimensions: 49.5"" - 52.25"" H x 28.5"" W x 28.5"" D Warranty: * Limited lifetime warranty