This transparent sapphire watch glass has a hardness that ranks nine out of ten in the Mohs scale, making it the hardest material second to diamond. It is also designed to be anti-impact, anti-scratch, extremely high melting temperature and with high electrical resistance, so it withstands the test of time.

• Sapphire crystal glass
• Watch case
• High quality & craftsmanship
• Available custom design & drawing
• Available any coating & metallization
• Vicker hardness: 2000 - 2500 daN/mm2
• Tensile strength: 26 daN/mm2
• Flexural strength: 35 - 39 daN/mm2
• Welcome inquiry for any drawing & details.