18mm & 12mm Optical Grade Precision Ground GLASS Lenses Features 10X or 20X Magnification, Triple Chrome Plated Brass Body, Tapped with Bezel Ring, Bale Loop can be attached to Lanyard or Chain Compact, carry in pocket or purse, Housing protects lens when not in use. Includes Storage Case, QO-USA Since 2008 Quality Optics USA Folding Jewelers Loupe Style Pocket Magnifier Collection