... microwave ovens thermostable rubberB..Electronic profession seal or rubber components, like in handset pressed key, in DVD ... including Buna-N (NBR), HNBR, VITON, Silicone, FluoroSilicone, EPDM, Teflon, Natural Rubber, BUTYL, SBR, Neoprene, HYPALON, etc. ... to become one of the high-quality in China, step-by-step with the growth of ... (WRC) drinking water standard certification. Silicone Rubber O-Ring