Sapphire Crystal Watch Glass?? Round & Square Flat Replacement Parts, 0.5mm-3mm Thickness. Restore your watch with a genuine sapphire crystal replacement glass. Available in multiple round, square and flat shapes and sizes to fit a wide range of watch models. Choose the exact dimensions and thickness that match your watch’s original crystal. Mohs hardness of 9, just below diamond, for excellent scratch resistance. Highly transparent for a clean, undistorted view of your watch dial. Smooth polished edges and surface, no rough or sharp spots. Heat & Wear Resistant. Withstands high temperatures and daily wear without clouding or degrading. Select the size and thickness combination that matches your watch’s original crystal e. 20mm x 20mm x 1mm, 8mm x 2mm round, etc. Please double-check your watch’s original crystal dimensions before ordering, as sapphire glass cannot be resized once cut. Round / Square / Flat. 0.5mm, 1mm, 2mm, 3mm. Watch Repair / Replacement Part. Will this fit my watch? Measure your watch’s original crystal diameter/side length and thickness, then select the matching variation. A small measurement tolerance of 0.01-0.2mm may occur due to manual production. Is this real sapphire? Yes, this is genuine sapphire crystal with Mohs hardness 9, offering excellent scratch resistance. Can it withstand impact? Sapphire is highly scratch-resistant but can chip or crack under strong impact, so please handle and install carefully.