... , EPDM 2) Model:TC,TB,TA,SC,SB,MG,etc valve stem seal features: 1) Materials: NBR, NR, FPM, MVQ, EPDM ... ,MG,etc Products name oil sealExperiencemore than15 years` experience in rubber parts producing and mold developmentMaterialSilicone, NR, SBR, NBR., EPDM, ... and evaluation to the performance and application condition of rubber material then design the formula according to clients` requirement ...