Features: 1.High Quality Material: Marine drain plug is made of 316 stainless steel material, rustproof, high hardness, sturdy and durable. 2.Function: Stainless steel drain plug provides bilge drainage, and the fixed screw system prevents plug loss. 3.Good Sealing: Garboard transom boat plug has good tightness, provide a watertight fit, stable performance and high reliability. 4.Professional Design: Professional manufacturing, proving you with a better using experience and efficiency. 5.Wide Application: Garboard drain plug has a wide range of applications, suitable for ship stern, fish well, freezer, or boat and yacht. Specification: Item Type: Marine Drain Plug_x000D_ Material: 316 stainless steel, mirror polish surface_x000D_ Hole Size: Approx. 25mm/1in_x000D_ Application: Providing bilge drainage when towed out,heavy duty drain plug for marine garboard. Note: Marine oval drain plug fits 1in diameter fixed opening (1in diameter hole is required for marine drain plug kit installation)