... 3. 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 ... , Three or Four Ring Grooves ,Ceramic Spraying4. We can offer you The 1 Steel-insert piston , 2 ALFIN piston , 3 Cast Iron piston , 4 Cooling channel ...