... O-ring:NBR CR SBR EPDM CR FKM etc 2.Usage:sealing parts 3.Certificate:ISO 9001 TS16949,RoHS. O ... Size:These can be manufactured in various sizes according with client required. We have our own tooling dept. ... EPDM, FKM, IIR, BR etc.. Performance for rubber o ring:Durable in liquid material, mineral oil and lubricantGood resistance to ... of gasWithout harm to human body.With RoHS approval. O ring