... Professional factory to produce silicone o-ring and gasket with higher quality and competitive price. FDA silicone rubber o ring Features ... ,1) Available material : material for Silicone NBR,Fsil,VITON(FKM)&Dow elastomers,Neoprene,HNBR,Natural rubber ... sizes and colors.5) Available indiffernt kinds of slicone gaskets,silicone seals,custom molded seals.6) Our professional R&D team can ...