Kayak Drain Plug Replacement Nylon Molded nylon. Designed to fit securely in a 1" hole without the use of fasteners. The ridges on the body of the drain plug are designed to keep the plug in place. Sealant should be applied prior to installation to make a watertight seal. comes with the base and the thread in plug and the 2 x s.s. screws Injected molded Nylon, designed for 1" drain hole, bright red rubber gasket on the drain plug, screw holes are inch and a half center to center, Made in USA