Stainless Steel Marine Boat Oval Garboard Drain Plug Yacht Raft Dinghy Kayak Canoe Screw Sealing Plugs Marine Hardware Accessories. Features include 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 material: 316 stainless steel, size: 55x32x50mm, weight: 16g, and packing: OPP bag.