## Piston Rings 69.20mm Namura NA-10025-3R - Reliability and Performance for Your Engine Often overlooked, piston rings are a crucial component influencing engine performance, efficiency, and durability. The Namura NA-10025-3R piston rings with a diameter of 69.20mm guarantee quality and precision, designed to ensure optimal operating parameters. ### Advanced Materials and Technologies Namura uses high-quality materials in the production of piston rings, such as ductile cast iron and stainless steel alloys, ensuring excellent wear resistance and sealing. Additional chrome, phosphate, and nitride coatings enhance durability and corrosion resistance, adapting the rings to specific operating conditions. ### Compression Rings Compression rings, made of ductile cast iron or stainless steel, guarantee the tightness of the combustion chamber, minimizing compression losses and ensuring optimal engine performance. Chrome, phosphate, or nitride coatings further enhance their wear resistance. ### Oil Control Rings The oil control ring set consists of two scraper rails made of 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 effectively scrape off excess oil, preventing it from entering the combustion chamber and ensuring optimal lubrication. ### Namura Brand - Synonym for Quality Namura is a renowned manufacturer of motorcycle and scooter parts, known for the high quality of its products. The NA-10025-3R piston rings are further proof of attention to detail and an innovative approach to design, guaranteeing reliability and long service life.