Product Introduction The sapphire watch crystal is manufactured from high-purity synthetic sapphire single crystal (Al₂O₃), widely recognized as the ....
Product Overview Through-hole ruby bearings are precision-engineered components made from synthetic single-crystal ruby (Al₂O₃ doped with Cr₂O₃). ......
Dia30mm/33.5mm/34mm/37mm/39mm/40mm/45mm A-axis Sapphire rough plate for wrist watch glass/ Sapphire watch glass A sapphire watch crystal is a watch .....