Oil seal and valve stem seals: 1) Material : NBR, FPM (VITON) , MVQ(SILICONE) , ACM ,EPDM ,PTFE( ... ) ,HNBR 2) ISO9001:2000 Supply oil seal and valve stem seals:We offer oil seals,valve stem seals for different cars, trucks, trailers, material are ... NBR, VITON, SILICONE , PTFE ,ACMwe offer PTFE lip oil seals ...