Features Safe And Reliable Design: The flexible coil current sensor features a coil with no exposed metal conductors, ensuring non-measurement safety for confident usage in various environments Compact And Lightweight: Measuring just 5.5 x 3.5 inches, this lightweight tool is Features: 1、 sapphire crystal glass, it is scratch resistant and wear？resisting. 2、Exquisite craft, making this glass lens are replacement for the original lens. 3、Suitable for watchmakers and watch repairing workers to use. 4、Easy and convenient for installation, super clear lens, directly fitment. 5、Highly transparent edges, smooth treatment, no scratches. Specification: Item Type: Watch Glass Material: Sapphire Crystal Glass Color: As shown in the picture Lens Diameter: Approx.25.5mm / 1.00in, 26mm / 1.02in, 26.5mm / 1.04in, 27mm / 1.06in, 27.5mm / 1.08in Error Range: Edge thickn is about 1~1.2mm/0.04~0.05in Diameter Error: ±0.2mm Package List: 5 x Watch Glass Note: betweendiv>1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.betweenbetweendiv>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.betweenbetweendiv>betweenbr>between Package List 5 x Watch Glass