1.Seveal material f or oil seal, o-ringand rubber gasket like:NBR, HNBR, CR, PDFE, EPDM,<br /> SILICONE, VITONE, etc.can shoose on your requirement; 2.Many types of oil seal:TC, TB, TA<br />, SC, SB, SA, VC, VB, VA, KC, KB, KA, DC, DB etc, also can make on your demand; 3.Mnay....<br />.