... .O-ring Widely used in all sealing industries. 2. OEM and TS16949 quality 3. 42 years experience. PQK Oil seal Auto ... ,FKM,VITON,ACM,EPDM,PTFE,SILICON,MVQ.4. Specially in designing and manufacturing all of oil(water) seals,gasket,o ring ,bolts5. OEM ... and ODM orders are welcome.6. Company have TS16949 quality certificates ...