6 4X Black Eye Loupes For Jewelers, Coin & Stamp Collectors. This is a new set of six 4X black eye loupes Great for jewelers and viewing stamps, coins, beads and gemstones. High quality, durable and lightweight. Each has 2 1/2" focal distance. We 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.