Stainless Steel Marine Boat Oval Garboard Drain Plug Yacht Raft Dinghy Kayak Canoe Screw Sealing Plugs Marine Hardware Accessories. Features include a black nylon boat bung drain plug, screw type drain plug for positive sealing, retention system to prevent plug loss, and mounts in a 1 inch diameter hole in hull. Specifications include 316 stainless steel material, 55x32x50mm size, 16g weight, and OPP bag packaging.