Springfield Taper-Lock Trac-Lock 2-3/8" Non-Locking Seat Mount [1100031-1]Taper Lock Trac Lock 2 3 8" Non Locking Seat Mount Features: 7 x 7 Non Locking Trac Lock Swivel High Strength Aluminum With Powder Coat Finish Rotates 360 Fits 2 3 8 Post Adds 3 4 To Height Of Pedestal WARNING: 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.