1, 0.01ct High pricision gem scale, 2, Max Capacity 20g, 3, Scale dvision to 0.001g, 4, Diamond scale with calibration weight 0.01ct High Pricision Diamond Jewelry Scale ( J112 ) 1. Jewerly scale model J112 is a premium quality, sturdy, digital scale,2. It is a patented product, powered by 2pcs AAA batteries,3. Flip-up protective cover and flip-up transparent acrylic draft shield4. Calibration ...