1Crystal Glass: The watch lens glass is made of sapphire crystal glass, which is hard to break, resistant to high temperature, scratch and wear. 2Good Transparency: The glass lens of the watch has good transparency, smoothly surface and edges, round corner is comfortable to the touch. 3Easy Cleaning: Crystal glass is easy to clean with a soft cloth after long term use. Please be careful not to use too hard paper or cloth, so as not to scratch the glass surface and affect the appearance of the watch. 4Precise Made: The round watch glass is well made with precise processing, easy to install, can perfectly match with your watch. 5Professional Substitute: This is a professional watch lens replacement, ideal for watch repair or maintenance.