This Genuine Tohatsu Marine Part is a piston with a 0.5mm oversize measurement. It is specifically designed for Tohatsu outboard engines and is identified by the part number 351-00004-1. This piston is a crucial component in the engine's combustion process, providing a tight seal within the cylinder to maximize power and efficiency. It is made with high-quality materials and precision engineering to ensure optimal performance and durability. Whether you are replacing a worn-out piston or upgrading your engine, this Genuine Tohatsu Marine Part is the perfect choice for maintaining the reliability and performance of your Tohatsu outboard motor.