rubber washer gasket 1.ISO Certification 2.Material:NBR,NR,Silicone,FKM etc 3.Precisely mold design 4.OEM/ODM rubber washer gasket1.ISO Certification 2.Material:NBR,NR,Silicone,FKM etc 3.Precisely mold design 4.OEM/ODMDescription of High Quality Rubber Washer Conform to ROHS: 1. Materials: NBR, also can be NR, HNBR, Buna, FVMQ, MVQ, ACM, FLS, CR, SBR, SI, BR, IR, EPDM, IIR, butyl, PU, E/A, ECO, ...