Rubber ring gasket for PVC pipes EPDM rubber ISO9001 and ISO14001 MOQ 1000 ... rolling mill, reinforced oil seals with fabric, large dust proof gasket.materials: nr, nbr,acm,epdm,ptfe,silicon,neoprene,viton,etc ... %82.9%2) Retention of Elongation, %60%95% Rubber ring gasket for PVC pipes