... ring As a leading rubber manufacturer ,we can provide rubber o-ring,gasket,washer with high-quality black FKM rubber o ring Features,1 ... ) Available material : material for NBR,FKM,FPM,VITON(FKM)&Dow elastomers,Neoprene,HNBR,Natural rubber ... parts for sealing Our factory is a professional manufacturer of rubber products ,you can get much more information from our ...