... , EPDM 2) Model:TC,TB,TA,SC,SB,MG,etc valve stem seal features: 1) Materials: NBR, NR, FPM, MVQ, ... name oil sealExperiencemore than15 years` experience in rubber parts producing and mold developmentMaterialSilicone, NR, SBR, NBR., EPDM, CSM, CR, ... 500tonsQC20 persons team make sure every products satisfied clients` request and quality standardR&D10 persons team ,OEM & ODMShapeAccording to drawings ...