rubber o ring 1. material: NBR, FPM,MVQ,EPDM,etc 2.oil ... :ISO/TS16949 ISO14001 4.good price Product/Service(We Sell):break cupsMaterialEPDM, NBR, etc, just as your request.CertificationISO 9001:2000 ... according to your Requirement2.Designs and Specification are Accepted rubber O ring