... human body demonstration, massage acupuncture point explanation, anthroposcopy, artSilica gel (Silica gel, Silica) alias: silicone rubber is a kind of highly active adsorption ... silica gel, coarse hole silica gel, type B the silica gel, the fine mesh silica gel.Safety performance: silica gel main ingredients are silica, stable chemical properties, combustion. Silica gel is a kind of amorphous silica ...