Taper-Lock Trac-Lock 2-3/8″ Locking Seat Mount2-3/8 post mount with bushing for snug fit. Made of high-strength aluminum, with powder coat finish. Centrally located locking handle, easy to reach with left or right hand. Features:Rotates 360For use with 2-3/8 fixed height pedestalsPost Adds 3/4 To Height Of PedestalWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.