This foldable portable magnifier is made of ABS and glass. The magnification is 5 times, the transparency is high, the dispersion coefficient is small, the image clarity is good, and the magnified edge is clear. Protect your eyesight with double-layer lenses that don't hurt your eyes.which can be put into the wallet, shirt and pants pocket, 45 mm diameter, nice for student field survey, jewelry identification, office, printing and manufacturing, elderly reading, antique appreciation., etc.