17.5x Power Magnification with Dual Lens Focusing Knob | Item Dimensions: 2.0 inch (L) x 2.0 inch (W) x 1.8 inch (H) Contains Dual Lens Element For Higher Magnification and Less Distortion | Lens Diameter: 0.75 inches Great for examining intricate details for film negatives, coins, currency, stamps, printing,...