This Genuine Tohatsu Marine Part is a piston ring set with the part number 361-87123-0. It is designed specifically for Tohatsu outboard motors and is made from high-quality materials to ensure optimal performance and durability. The piston ring set is an essential component of the engine's combustion process, helping to seal the piston and cylinder and maintain proper compression. This part is a reliable replacement option for worn or damaged piston rings, ensuring smooth and efficient operation of your Tohatsu outboard motor.