... 4.we are factory 5.certifications:ISO\TS16949,ISO9001:2000 circle rubber sealing gasket 1, Materials: NBR, silione, NR ... violet, etc, depending on your own order.2, Types of O-ring, E-type, U-type, etc, can make ... on your size.3, Different sizes of Oil Seal, Rubber Seal, Rubber Gasket, O-Ring, ... red, white, yellow, brown,5, Your OEM order of Oil Seal, Rubber Oil seal, Rubber Seal or O-Ring ...