Discover the original linen tester, ideal for close-up inspection in textiles, printing, photography, and detailed craft work. This compact magnifier features a 30 mm diameter glass lens with 6x magnification, a 38 mm (1½ inch) working distance, and a 25 mm (1 inch) square viewing field. Includes both metric and inch graduations (1 mm and 1/8 inch divisions) for precise measurement. The self-standing design frees your hands for accurate adjustments, while the black powder-coated metal body ensures durability. Folds flat for convenient storage and transport, and comes complete with a protective plastic wallet, making it perfect for professionals and hobbyists who need reliable, portable magnification and exact measurement in one tool.