Flat Watch Crystal Mineral Glass Replacement. Specifications: Type: TOOLS Material: Mineral Glass Item Type: Repair Tools & Kits 28mm-38mm Diameter Mineral Watch Crystal 1.0mm Thick Flat Watch Glass; Please Ensure You Are Having the Exact Size Before Buying Through Precision Measurement(caliper); Diameter: 28/28.5/29/29.5/30/30.5/32/32.5/34/34.5/36/38mm (there Might Be ±0.05mm Difference), Thickness Approx. 1mm These Crystals Are Made to Replace the Watch Crystals for Wristwatch or Pocket Watch; Package Includes:10 Pieces Watch Mineral Glass. We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.