Feature:1. Adopting high‑quality sapphire crystal glass, strong and durable to use.2. High hardness, scratch resistance and abrasion resistance, long‑lasting.3. surface, high temperature resistant, suitable for replacing old watch glass.4. Watch repair parts, suitable for professional watch manufacturers and watch repairers.5. High transparency, with edges and no scratches, easy installation.Specification:Item Type: Watch GlassMaterial: Sapphire CrystalSpecifications and Models (Lens Diameter): Approx. 37.5mm / 1.48in, 38mm / 1.50in, 38.5mm / 1.52inQuantity: 3pcsMiddle Thickness: Approx. 2.2mm / 0.09inEdge Thickness: Approx. 1.7mm / 0.07inDiameter Error: ±0.2mm / 0.01in Package List:3 x Watch GlassNote:1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.