Review on 10mg/100g Precision Stainless Steel Jewellery Calibration by Robert Gilbert

This product will help you determine the accuracy of your scale measurements from 1g to 190g. If I 100gr. Weight on the electronic scale and when the scale shows 100g. it's pretty accurate. If you have a scale, you can combine different combinations from 17 pieces to a specific weight within a range to determine the exact weight of an item. 17 pieces packed in a small plastic case with a slot for each piece. The biggest slot was for 100g. the piece and the bottom were broken and if you lift the lid then 100gr. piece falls out. I considered just storing the case upside down, but when you do that all the weights fall out of their slots. Next time I go shopping I'll look for a small tube of good plastic glue. Some of the numbers stamped on the smaller weights are difficult to read, but it's easy to tell what a weight is by its relative size in relation to other weights. I would have given the product 4 stars but the broken case pushed it down to 3 stars.