Dual Side 30x And 60x Magnification Magnifier Loupe Led Light Lamp. 1, The Main Lens has a 21 mm diameter. 2, It is made of high quality material, durable enough for your daily using. 3, Quality lens for extra sharpness and clarity. 4, Compact, lightweight, great to have one in your pocket all the time. 5, Great tool for appraise jewelry, coins, stamps and antiques . 6, Premium quality, ideal for the watch or jewelry making industry. 7, 2 Bright LED Bulb to illuminate Viewing Field.