... -toxic 4.we are factory 5.certifications:ISO\TS16949,ISO9001:2000 circle rubber sealing gasket 1, Materials: NBR, silione, NR, FKM, etcgreen ... make on your size.3, Different sizes of Oil Seal, Rubber Seal, Rubber Gasket, O-Ring, etc.4, You could option the ... color you like on the Oil O-Ring, Oil seal, Rubber Seal, Rubber Gasket: Black, red, white, yellow, brown,5, Your OEM ...