Colored rubber o ring gasket 1.Material:EPDM,SBR,viton etc 2.Precisely mold design 3.Trial order welcomed 4.OEM/ODM Colored rubber o ring ... gasket Materials advice silicone and rubber(EPDM,NBR,SBR,CR,BR,IIR ... production mold, usually in 1-2 weeks.Packageplastic bag inside, strength carton outside,or as your request. Colored rubber o ring gasket