The case protects your iPhone against scratches and everyday damages. You have access to all ... , NR, BR, HNBR, VITON, TEFLON, EPDM, Silicone, Polyurethane, Polyacrylate, Neoprene, Leather, FDA ApprovedRotary Shaft SealsV-RingsO-Ring KitsU-Cup SealsRod Wiper ... SealsGamma SealsCustom Molded Rubber PartsCustom Molded Rubber Parts . silicone case designed for iphone 3G/3GS