great seal property oil resistance high temperature resistance wear resistance Back Up Ringmaterial:engineering plastic(peek,pps,ptfe,pi,pai,pei,nylon,pa66,pa6,pom,delrin,uhmwpe).manufacture method:prcesion process and injection molding.color:beige,white,black,sandy,brown.size:customized by sample and drawing.working temperature:100-260 Centigrade.Industrial Application1.Engine accessories2.Micro ...