High-strength aluminum with powder-coated finish. Large 7-1/4″ x 13″ seat mounting platform. Travels 5-1/4″ forward and backward of self-lubricating pads. Rotates 360�. Centrally located locking handle, easy to reach with left or right hand. 2-7/8″ post mount with bushing and tension knob for snug fit. Adds 1-1/4″ to pedestal height. Display package. ABYC Class: (AD) H-31 Driver.