3pcs AR-coating Watch Lens 20mmx1.5mm Round Flat Mineral Watch Crystal Glass

1. Made of great optical mineral glass, it is not easy to break and has a long service life.
2. The AR-coated mirror increases the light transmittance and reduces the impact of radiated light on the line of sight. It is crystal clear and has high transparency.
3. Easy to install and replace, the broken one can be easily replaced. It's very suitable for watch repairman to repair their watch by themselves.
4. Before installation, look along the edge of the glass lens and you will see which side is coated. The coated side should be installed on the bottom