Motorcycle Engine Part Piston Rings Kit Size: 78mm Material: Nodular Cast Iron OEM Codes: Piston 13101-KRN-670, Piston Ring 13011-KRN-A10 Package Contents: As shown in the pictures Designed for compatibility with select models including CRF250R and CRF250X.Made from nodular cast iron for durability and performance in off-road and motocross conditions.The kit is a direct replacement for parts, ensuring ease of installation. A 1-month replacement policy is offered, excluding electrical components.Customer support is available for assistance with any product inquiries. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.