1Premium Materials: Made of durable plastic and acrylic, not easy to damage, impact resistant and has a long service life. 2Waterproof Design: Adopts waterproof design, it can provide excellent watch protection. 3Fine Workmanship: With fine workmanship, manufactured to exact specifications and sizes of the original. 4Lightweight and Portable: The round watch crystal lens is light, portable, and easy to carry. It is a perfect replacement. 5Great Choice: This transparent watch lens is very suitable for watch craftsmen, and is an excellent choice for watch maintenance.