500 gram Calibration Weight for 3R Digital Pocket Grain Scale

This 500 gram weight is for calibrating your 3Rivers Archery Digital Pocket Grain Scale. This is the required weight if you want to recalibrate the scale. It is precision made to keep your grain scale working at its peak performance. Makes your scale practically error-free. A great investment to keep your 3Rivers Archery Digital Pocket Grain Scale working accurately for years to come.