1Applicable Model: This boat motor piston ring kit is suitable for Mercruiser Quicksilver 30 to 60HP. Its robust construction ensures that it can withstand the demands of daily use. 2OE Number: 39 827491A12, 39 893525A01 are the reference part number. It is engineered to meet or exceed OEM specifications, ensuring that it matches the form and function of the original equipment. 3Superior Durability: The piston ring set is made from sturdy metal alloy material that helps resist everyday wear and tear, ensuring reliable operation and extended lifespan. 4Enhanced Seal and Performance: With the installation of the new piston rings from this set, the engine benefits from improved sealing capabilities for enhanced performance. 5Extended Engine Life: By replacing worn out or damaged piston rings with this aftermarket set, the engine's overall lifespan can be extended.