## Namura NA-10001-3R Piston Rings - Reliability and Performance for Your Engine While often overlooked, piston rings play a crucial role in engine performance and longevity. The Namura NA-10001-3R piston rings, designed for pistons with a diameter of 86.72mm and 86.73mm, guarantee the highest quality and precision. Namura, a brand known for its attention to detail and innovative solutions, delivers a product that will meet the expectations of even the most demanding motorcycle and scooter users. ### Advanced Materials and Technologies Namura uses carefully selected materials in the production of NA-10001-3R piston rings, such as highly ductile cast iron and stainless steel alloys. These materials provide excellent wear resistance and sealing, resulting in optimal engine performance. Depending on the model, the rings may also be coated with chrome, phosphate, or nitride, further enhancing their durability and lifespan. ### Compression Rings The compression rings are designed to ensure a tight seal in the combustion chamber. Made of highly ductile cast iron or stainless steel, they perfectly fulfill their role, minimizing pressure loss and ensuring maximum engine efficiency. ### Oil Rings The oil rings consist of three components: two scraper rails made of highly ductile cast iron or stainless steel, coated with chrome, nitride, or phosphate, and a single expander ring made of stainless steel. Their task is to precisely dose the oil, preventing excessive engine wear and ensuring smooth operation. By choosing Namura NA-10001-3R piston rings, you are investing in the reliability and long life of your engine.