1.material:teflon ,ptfe,rubber,nbr,ect 2.various size and color 3.type or structure:TC, TB, SC,ect 4. ... , KA, DC, DB etc, 3. High resistance to chemical agents and solvents 4. Different sizes of Oil Seal,Rubber Oil Seal ... ,Rubber Seal, also can make on your size.5.Optional color for you of the Oil Seal,Rubber ...