Adam Equipment ASTM 4 - 100g Weight
This ASTM Class 4 stainless steel and aluminum 100 milligram calibration weight has an accuracy of +/- 0.10 milligrams (0.0001 grams). Use this calibration weight alone, or combine it with more weights to accurately calibrate your digital weighing scale.
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Free US FedEx Ground shipping is for online orders greater than or equal to $500 if the item weighs less than 100lbs (actual and dimensional weight) and is inside of the contiguous United States (excluding Hawaii and Alaska).