1.materials in NBR,EPDM,SBR,FPM 2.all kinds of types 3.verious colours 4 ... . Material: NBR, SILICONE, VITON,HNBR, CR, PTFE, EPDM, etc. 2. types: TC, TB, TA, SC, SB, SA, VC, VB, ... .4.Optional color for you of the Oil Seal,Rubber Oil Seal,Rubber Seal,Rubber Gasket, O-Ring :Black, red, yellow, brown, ... Your OEM order of Oil Seal,Rubber Oil Seal,Rubber Seal or O-Ring and Rubber Gasket is welcomed as well.6. ...