piston ring for VOLVO 130.18*2.4+3.15+4.75 3 rings all chrome. piston ring for VOLVO1)130.18*2.4+3.15+4.752)3 rings all chrome.3)material:nodular iron,cast iron,steel,alloy,and etc(we can do as customer's request)4)surface treatment:polishing,plating,oxidation,phosphating,and etc(we can do as customer's request)5)packing:as customer's request6)prduct advantage:reduce fuel consumption.