... ring 1.Certificate:ISO9001:2008 2.Material:NR.NBR.EPDM.etc 3.Different size Product NameEPDM rubber o ringCertificateISO9001:2008Country ... vegetable oilSizeWe can provide you with many different sizes of EPDM rubber o ring according to your drawing or samplesMatetialNBR, NR ... ,EPDM ,SBR ,SR ,CR ,IIR ,etc.PackingInner packing is by plastic ...