GOFOIL Carbon Adapter Plate - Includes Mounting Screws and Case - Unused - Model Name: GOFOIL 1578 - Accessories: Mounting screws, case - Color: Black - Material: Carbon - Shape: Plate type This is an adapter to convert a deep tuttle mast to a plate mast. When I tried to install it, there was a slight chip on the inside, but there are no problems with use. Included: 4 bolts, 4 washers, 4 T-nuts (unused), bolts for deep tuttle fixation This allows you to use a deep tuttle mast on a plate-specific board. The mast length will increase by approximately 8cm. Durable and lightweight GOFOIL genuine product. No claims and no returns, please.