1.material:teflon ,ptfe,rubber,nbr,ect 2.various size and color 3.type ... washer describle:1. Material: teflon,NBR, SILICONE, VITON,HNBR, CR, PTFE, EPDM, etc. Can choose on your requirement;2. types: TC ... .5.Optional color for you of the Oil Seal,Rubber Oil Seal,Rubber Seal,Rubber Gasket, O-Ring :Black, red, yellow, brown, white, green ...