Namura, NA-50081, 2 Size A Piston Kits Polaris Sportsman 800 HO Standard Bore 80mm Manufactured by Namura Kit includes 2 pistons, ring sets, pins, clips (you get exactly what is pictured) Cast piston has super-high silicone content for additional strength Piston skirts are Molybdenium Teflon coated to minimize resistance/wear and provide extended life Piston dome is anodized for superior heat resistance and longer lifespan