1Sapphire Glass: The watch lens is made of sapphire glass, which is not easy to break, strong and durable, and has good transparency. 2Resistant to High Temperature and Wear: The watch lens has a slick surface, resistant to high temperature and wear. 3Comfortable in Hand: watch glass lens has rounded and slick edges, comfortable in hand and free of scratches. 4Easy to Clean: Watch sapphire glass lens is easy to clean, just wipe it clean with a soft cloth after longer term use. 5Professional Replacement: Watch sapphire glass lens is suitable for professional watch lens replacement, prepared for professional watch maintenance and repair.