... stem seal: 1) Materials: NBR, NR, FPM, MVQ, EPDM 2) Model:TC,TB,TA,SC,SB,MG,etc valve stem seal ... : 1) Materials: NBR, NR, FPM, MVQ, EPDM 2) Characteristics: high/low temperature-resistant, wearing-resistant, oil-resistant. 3)TC,TB,TA,SC ... customer ideaDimensionDepended on your demand.ColorFor silicone any color available, for rubber usually black color, depended on your demand