NR Rubber O ring 1.Certificate: ISO9001:2008 2.Material: NR, EPDM, Silicone, etc ... oilSizeWe can provide you with many different sizes of rubber ring according to your drawing or samplesMatetialNBR, NR ,EPDM ,SBR ,SR ... products for a wide range of valves and pipes, rubber seals, auto rubber parts, industry rubber parts, auto rubber parts, rubber ...