ITEM NAME:Screw Type Boat Nylon Drain Plug 1 Description: Fit for 1" inch drain holes. Screws are made of durable Stainless Steel. Rubber gasket on each plug protect hull from damage. Fine threads maintain sealing under high vibration.The plugs prevent all water from intruding into the kayak and will keep you dry out on the water. 1 Piece Drain Plug. Material: Nylon, stainless steel. Color may vary slightly due to the color setting of each individual monitor.