... Piston Ring 1.Engine piston ring, auto piston ring 2.Different treatment:Phosphated, Nitrided etc. 3.ISO9002,QS9000,TS16949 Piston Ringpiston ring for Isuzu 4JB1:1.piston ring ... do as per customer's request)3.piston ring characteristics:1)wear-resistant2)high temperature resistant3) ... piston ring model as follows:CommodityPart NumberCummins piston ring6BT,6CT,NT855,NH220,NH250,N14,V265,V300,VT6-280,M11 ...