auto rubber o ring 1.Material:HNBR 2.High/Low temperature resistance, ... /8 5/8 3/4 5/16 auto rubber o ring1)We have kinds of material : NBR,HNBR, ... We can design, produce according to your drawings.We specialize in providing different rubber products, class equipment, advanced management and ... . Our main product are molded rubber parts products like O rings, rubber seals, rubber band, oil seal,water ...