30-40mm Al2O3 Grooving Domed Sapphire Crystal Sapphire Watch Crystal
Al2O3 30-40mm Grooving Domed Sapphire Crystal Watch Glass Lens
Sapphire crystal feature:
sapphire crystal is very popular in most wristwatch, Because of its hardness (second only to Diamond),Sapphire crystal is extremely hard and scratch resistant. It is the hardest of the oxide crystals, being the next strongest material to diamond. 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 able to be cut thinner than alternative crystals due to its structural durability.
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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