40X 25mm Illuminated Jeweler LED UV Lens Loupe Magnifier with Metal Construction and Optical Glass (40x,25mm) This 40X magnification Illuminated Jeweler Loupe is built from durable metal, with an optical glass 25mm in length. This eye loupe is great for rock collectors, coin collectors, jewelers, hobbyists, and also makes a great gift for the kids to explore the fabulous tiny world. Bright LED and UV Light: You can see objects clearly in dark or insufficient light conditions with this dual LED light source. The UV light works as a counterfeit detector for things such as the paper currency, passports, Credit cards, and traveler's checks etc. Pocket size: it is very convenient to carry and you can use it anywhere. It requires 3 LR1130 batteries (Batteries are Included). Magnification: 40x Lens Diameter: 25mm