20-30mm Customized Round Domed Sapphire Crystal Watch Glass
20-30mm Customized Round Domed Sapphire Crystal Watch Glass
sapphire crystal feature:
Sapphire crystal is extremely hard and scratch resistant.Because of its hardness (second only to Diamond), It is the hardest of the oxide crystals, being the next strongest material to diamond,Sapphire is the second hardest crystal next to diamonds and, Sapphires are used in industrial applications such as components for watch crystals and movement bearings, scientific instruments, high-durability windows, and insulating substrates in special purpose solid state electronics.Sapphire is grown using a variety of methods. Standard grade Sapphire material is grown by Verneuil and Czochralski methods, whereas higher quality Sapphire is manufactured by the Kyropulus growth method.
Q: Do you provide samples ? is it free or extra ?
A: Yes, but it's a precision product that requires extra cost and freight.
Q: How can I customize my products?
A: Attach your drawings with details (Surface treatment, material, quantity and special requirements etc).
Q: How did you test the product before they are packed?
A: We have strict QC procedure, each product will be tested by three times even more with professional machine before packing.
Q: What if the products we received are not good?
A: Contact us without hesitation, our special after-sales service will take the responsibility.
Q: What's the material of your products ?
A: Sapphire
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