This Genuine Tohatsu Marine Part is a piston ring set in standard size. The part number is 3G2-87123-0. It is compatible with Tohatsu outboard motors. The piston ring set is an essential component of the engine, responsible for creating a tight seal between the piston and cylinder wall. It ensures proper compression and prevents oil leakage. This particular piston ring set is manufactured to meet Tohatsu's high-quality standards, ensuring optimal performance and durability. It is a reliable replacement part for maintaining the efficiency and longevity of your Tohatsu outboard motor.