1,Name:Silicone O-Ring 1,Good qulity&best price 2.Sizes:as ... profession seal or rubber components, like in handset pressed key, in DVD antirattler, electric cable wire connection seal and ... hardness for your option, including Buna-N (NBR), HNBR, VITON, Silicone, FluoroSilicone, EPDM, Teflon, Natural Rubber, BUTYL, SBR, Neoprene, ... British WRAS (WRC) drinking water standard certification. Silicone O-Ring