... 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 material :nodular iron, cast iron, ... fuel consumption4)long working life4.Our piston ring model as follows:CommodityPart NumberCummins piston ... way we can! Piston ring for Isuzu 4JB1