valve oil seal -Material:NBR,Viton,EPDM,PTFE,PU,MVQ... -Good Quality ... : ISO9001:2001 -Manufactory Product and sell all kinds of valve oil seal : 1. Applications: automobile, motorcycles, agricultural machinery, trucks, buses, trailers ... CNC machine.6. Specialized in designing and manufacturing all of oil (water) seals, gaskets, o rings, bolts.7. OEM and ODM ...