Amazon.com: Smart Weigh 50g x 0.001 Grams, Premium High Precision Digital Milligram Scale, Includes Tweezers, Calibration Weights,Three Weighing Pans and Case: Home & Kitchen
U.S. Solid 0.001g 1mg Digital Analytical Balance Precision Scale for Laboratories (100x1mg) 110-220 VAC, w/ RS232 Interface, Dust Protective Cover, Calibration Weight: Amazon.com: Industrial & Scientific