auto rubber o ring 1.Material:HNBR 2.High/Low temperature resistance, ... 3/8 5/8 3/4 5/16 auto rubber o ring1)We have kinds of material : NBR,HNBR,EPDM, ... alkali resistance, anti-aging, no poison and no smell3)It's an ideal solution for sealing application where there are high ... capabilities. Our main product are molded rubber parts products like O rings, rubber seals, rubber band, oil seal,water seal ...