... o ring we supply EPDM rubber o ring, silicone rubber o ring, ACM rubber o ring, NBR rubber o ring, HNBR rubber o ring, FPM rubber o ring, CR rubber o ring, viton o ring, etc.Rubber o ring descriptions:1 ... used in automotive, industrial, mechanical, telecom, mechanical, or special purpose. 7. Certifications: ISO9001:2008, TS16949, and meet RoHS directive.8. QA ...