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Men's 3pcs AR-coating Watch Lens Round Flat Mineral Crystal Glass

Size - Material: Optical Glass; Mirror Type: AR-coating; Diameter: 19.5mm / 0.77-inch; Thickness: 1.5mm / 0.06-inch Material - Made of great optical mineral glass, it is not easy to break and has a long service life. Feature - 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. Application - 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. Note - 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.