Made of sapphire crystal glass, not easy to break, strong and durable. Good transparency, smooth surface, high temperature resistance, scratch resistance, wear resistance.
The watch glass lens is very transparent, with rounded and smooth edges, comfortable hand feel, no scratches.
There is a green light transmitting layer in the middle of ordinary optical glass, and this sapphire glass interlayer light transmitting layer is white, not blue.
Notice: The lens diameter tolerance is ±0.05mm, please use a caliper to measure the diameter/thickness before purchasing. Never use low-precision tools such as soft rulers, rulers, or measuring software to measure. The marked size does not include the waterproof ring, which is 0.5mm in diameter.
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