Zoom icon Click to expand Tap to zoom Chevron down icon Chevron down icon 1.50 mm Thick Flat Round Sapphire Crystal (29.0 mm to 31.5 mm) by PERRIN Sale $17.60 | / SKU CR-SPF15-3-29-0 29.0 mm - $17.60 29.5 mm - $17.60 30.0 mm - $17.60 30.5 mm - $17.60 31.0 mm - $17.60 31.5 mm - $17.60 29.0 mm 29.5 mm 30.0 mm 30.5 mm 31.0 mm 31.5 mm Diameter (mm) Chevron down icon 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Notify me when back in stock Email address Email me when available This crystals are a scratch resistant crystals for high-end watches. This crystals have a polished top edge.