Four 10X Round Loupe Great For Viewing Stamps, Coins, Beads & Gems. This is a new set of four 10X round loupes. Great for viewing stamps, coins, beads and gems. May help reduce eye strain. The swing away cases protects the lenses. The viewing lenses each measure approximately 16 mm (5/8") in diameter. Each has a 1" (25.5 mm) focal distanceWe work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.