I am selling a Garelick Ribbed Seat Bushing. It is new out of the box and comes as shown in pictures. It is white plastic constructed and measures roughly 3 3/4" H x 3 3/8" OD and has an ID of 2 7/8". Per manufacturer: " Fits all smooth 2-7/8" diameter pedestal bases. Low profile design allows 360B0 of rotation. Heavy duty anodized aluminum slide plate has standard 5" x 12" hole pattern to accommodate standard seat mounting holes. 360B0 rotation is regulated by dual locking devices - lift the positive lock lever to rotate. Drop the lever to lock in place in 10B0 increments. Secondary twist control offers variable drag adjustment and can be tightened down to lock in place. " For more information please contact a dealer in your area (BB /BE032/ 1014937). Shipping cost is for the continental United States (lower 48) only. For shipping outside of the continental United States please inquire about shipping cost before purchase. Shipping to Alaska, Hawaii and Puerto Rico may incur additional shipping costs.