The byomic jewelry magnifier triplet byo-it2018 20x18mm is a convertible magnifier, which consists of three lenses. these lenses have a combined magnification of 20x and a lens diameter of 18mm. this type of magnifying glass is often used for observations of jewellery, for example. you can easily slide the triplet over your index finger. this allows you to study the finest essential details of the material to be examined. Usage byomic jewelry magnifier triplet byo-it2018 20x18mm The compact magnifying glass is lightweight and easy to carry in the included artifical leather pouch. for high reliability, the housing is made of metal; the lens is made of high quality glass. this gives you an extremely clear image and a high scratch resistance. • length folded out: 50mm • length not folded: 30mm • height magnifier: 21mm • weight: 10 grams