Rubber Oil Seal, 1. Material: NBR, SILICONE, VITON,HNBR, CR, PTFE, EPDM, ACM ,FKM,etc. 2. types :TC, TB, TA, SC, SB, SA ... , VC, VB, Rubber Oil Seal, 1. Material: NBR, SILICONE, VITON,HNBR ... . Can choose on your requirement;2. types of Rubber Oil Seal: TC, TB, TA, SC, SB, SA, VC, VB, VA, KC, KB ...