... . Meet-your-needs packing NPR RIK piston ringA: 8PE1 engine piston ring1. Piston ring Material : Cast iron , Alloy , Steel2. Piston ring Feature : 1 Chrome-plating ,2 Line ... One piece casting piston , 6 Compages piston , 7 Forged piston3. Piston Feature : Satin Anodised Aluminium ,phosphating , Alfin ,Double Alfin , No Alfin , Graphite , Oil cooling ...