ForeStar Industries PosiPost Base Assembly is designed to securely hold the seat post. ForeStar Industries PosiPost Base Assembly Fits 2-3/8" keyed removeable pedestals Base design is 9" long with One Flat Side configuration Gray Anodized Aluminum Die Cast (Seat not included) Part # 380015-SDG Keep all of your marine accessory needs with Marine Fiberglass Direct. *All International Orders may require additional shipping charges depending on location.