This Genuine Tohatsu Marine Part is a piston with the part number 309-00001-1. It is designed specifically for use in Tohatsu marine engines and is made from high-quality materials to ensure reliable performance and durability. The piston is an essential component of the engine's combustion system, helping to transfer energy from the fuel to the crankshaft. With this Genuine Tohatsu Marine Part, you can be confident that your engine will run smoothly and efficiently, even in demanding marine environments.