This is a good NIST Class F stainless steel weight kit, the type used nationally by local sealers and state inspectors for calibration of commercial (legal for trade) scales. Set contains (5) 5 lb. (2) 0.2 lbs, (1) 0.1 lb. (1) 0.05 lb, (2) 0.02 lbs. & (1) each 0.005 lb.
The smallest weights are aluminum, all others are type 2 stainless steel. There is an older seal inside the cover from the Georgia weights & measures lab, but this has been verified subsequently here at the 4 M Tool Metrology Lab, exceeding ASTM 6 or NIST Class F tolerances. The outside of the box shows some small rust on the corner pieces and latches, but otherwise this is a nice weight kit.
The item "Troemner 30 lb Weight Set-Stainless 21 pieces" is in sale since Friday, October 15, 2021. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Medical/Lab Equipment Attachments & Accessories\Calibration Weights". The seller is "4mtool" and is located in Vassalboro, Maine. This item can be shipped to United States.