HIGH QUALITY; Made of ultra-thick, scratch-resistant glass, surrounded by a silver chrome protective case GREAT FOR; The magnifying glass is ideal for identifying intricate markings and details inside rings and for studying geology, coins, stamps, miniature paintings and antiquities. SIZE; Dimensions of the magnifying glass: 56 x 24 mm (length x width) Lens diameter: 21mm with 30x magnification magnifier PORTABLE; Includes a small loop on top to attach to a neck chain or keyring, useful if you use the magnifying glass professionally, to keep it always close at hand MATERIAL ; Chrome-plated metal Trust our lens for clarity and sharpness This pocket-sized jewelry loupe has 30x magnification in a 21mm loupe and, at like a magnifying glass, gives small objects instant clarity and sharpness. Perfect for identifying hallmarks and minute details inside rings and for the study of geology, coins, stamps, miniature paintings and antiquities. The eye magnifier is contained in a protective chrome case that can be easily attached to your keys and is suitable for both personal and professional use. POCKET MAGNIFIER; See tiny objects up close with powerful 30x magnification FINDING PUNCHES; This magnifying glass is ideal for identifying hallmarks on jewelry, such as inside a ring WATCH REPAIR; Small, intricate objects such as watch parts can easily disappear and be damaged during repairs, but this lens allows watch parts to be precisely extracted and reinstalled later ART ET ANTIQUES; Suitable for viewing the brushstrokes and composition of miniature paintings as well as the finer details of small antiques PROTECTIVE BOX; Your glasses will arrive in a clear presentation case, which will also help protect the lens Note: Due to manual measurement, please allow 0-2cm difference. Thank you for understanding. The monitor calibration method is different. The color of the prod