... Material : Cast iron , Alloy , Steel2. Piston ring Feature : 1 Chrome-plating ,2 Line-honing ,3 nitridation , 4phosphating , 5 Molybdenum plated(Moly ... ) ,6 Nitrided ,7 Oxidized ,8Nano , 9 Zirconium-plating ,10 Sandblasted ,11 Special honing, 12 Titanium-plating, 13 Rail With TeflonFor Mitsubishi engine details ...