Accuris™ Precision Balance, 320 grams, readability 0.001grams, 115V, Cat. No.: BM-W3200-320, Six models are available in the Precision Balance range, covering a wide range of maximum capacity requirements. The smaller capacity models (120g, 320g, and 500g) include a glass draft shield with 3 sliding doors for easy access the weighing chamber. These models offer readability to .001g (1mg). The larger capacity models (1200g, 3200g, and 5000g) feature a more traditional top-loading design, come with larger weigh pans and have readability to 0.01g