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 Oil Seal,Rubber Seal,Rubber Gasket, O-Ring :Black, red, yellow, brown, white, green, violet etc, can make it on your ...