The Yamaha OEM 1 Piston Std Ring Set, with manufacturer part number 6CB-11603-00-00, is a genuine replacement part designed specifically for Yamaha outboard engines. This high-quality piston ring set is essential for maintaining the performance and reliability of your boat engine, ensuring optimal operation and durability. While it does not come with a warranty, you can trust in the Yamaha brand for producing top-notch marine parts and accessories. This product is a valuable investment to keep your outboard engine running smoothly.