... microwave ovens thermostable rubberB..Electronic profession seal or rubber components, like in handset pressed key, in ... DVD antirattler, electric cable wire connection seal and so onC..Various of seal ... Buna-N (NBR), HNBR, VITON, Silicone, FluoroSilicone, EPDM, Teflon, Natural Rubber, BUTYL, SBR, Neoprene, HYPALON, etc ... WRC) drinking water standard certification. Silicone Rubber O-Ring