This Genuine Tohatsu Marine Part is a piston ring set that is designed to fit Tohatsu outboard engines. It has a 0.5 oversize measurement, indicating that it is slightly larger than the standard size for optimal performance. The part number is 3G2-87124-0, ensuring compatibility with specific Tohatsu models. This piston ring set is a high-quality replacement component that helps maintain proper compression and sealing within the engine cylinder. It is a reliable and durable choice for ensuring the efficient operation of your Tohatsu outboard engine.