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Secondly, silicone products are widely used in daily necessities and electronics industries, such as: silicone mobile phone cases, silicone water cups, silicone bottle covers, silicone baby products, silicone placemats, etc. However, many people do not understand the application of silicone products in medical devices. In fact, the grade of silica gel can be roughly divided into three categories: including ordinary grade silica gel, food grade silica gel, medical grade silica gel and so on.