... service Industrial Rubber Bellows features,1) Available material : material for Silicone NBR,Fsil,VITON(FKM)&Dow elastomers,Neoprene,HNBR,Natural ... NSF KTW WRAS DVGW(W270) and we have certification for all of them9)Widely applied in faucet,toilets,fittings, ... pipes,showers and other industry accessories,and auto parts for sealing. Our factory is a professional manufacturer of rubber ...