Glass surface: dual convex (check the picture);.
Sapphire Crystal 1.2mm Dual Dome Watch Parts Mirror 18mm-42mm Mineral Glass Lens
2.5mm Thick Single DOME Mineral Watch Crystal 25-42mm Flat Bottom Dome Top Glass
CRYSTAL® Acrylic Watch Crystal High&Low Dome 19.0–40.8mm | 10pcs Pack (5 Sizes)
Hamilton Khaki Field 38mm | Glass Double Dome Sapphire Crystal CLEAR AR Coating
Dome WATCH CRYSTAL, ACRYLIC watch glass, READ FULL DESCRIPTION BEFORE YOU BUY
HIGH DOME WATCH CRYSTALS Acrylic Plastic Replacement Crystal Glass 27.8mm - 32.4
