Truweigh Calibration Weight 1000 Grams - Oiml Class M1 - High Precision Grade - Calibration Weight - Calibration for Digital Scale - Weight Set for Digital Scale Gram - Calibration Weights

The heaviest weight that it came with was a 100 g weight. It talks about having a 500 and a 200 g weight!! Nope they’re liars so I guess I’m gonna have to return it. Thanks a lot Cellular.

This calibration weight set comes in a nice case, but it appears that the seller uses this case for multiple different purposes or weight sets. The 3 smallest cylinder weights (2x2g & 1x1g) and the flat weights (10mg to 500mg) do not have a proper storage slot (see the pictures). If you put the 1g and 2 weights in the holes, they will fall out if the case is not kept level all the time (not practical if you travel with the weights. I put the small cylinder weights sideways in the slots meant for disk-shaped weights with the clear plastic, loose-fitting lid on top, and they seemed to stay in place even when the case was flipped over.The standard for this weight set is the Organisation Internationale de Métrologie Légale (OIML) standards; US weights used to calibrate lab scales would probably follow the ASTM International standard. From most accurate to least accurate, the OIML classes are E1, E2, F1, F2, M1, M2, & M3. Laboratories probably use E1 to F2 (very accurate), and this set is M1, which is pretty good for everyday scientific use like calibrating a scale used to measure small (e.g., 1g to 100g) samples while doing field work.When buying a set like, a proper case is a must to protect the weights. The tweezers are cheap plastic, but are adequate for picking up the smaller weights, and plastic will not scratch the weights, which is important because scratches can remove a very small amount of material from the weight, and a 10mg weight might then actually weight less than 10mg.For applications where your scale accuracy only needs to be around 0.1g, this is good set. However, if your scale needs a 100g or larger calibration weight, you will need to buy a different set, as the heaviest weight is only 50g, and you should ideally have one calibration weight of the right size, and not try to use multiple weights to achieve the calibration weight.

I purchased this as a weight standard for my portable travel scale and it works beautifully. If you need a 50 gram standard...this will do nicely. Ciao - SS

Cheaply made and lots of empty space in the container but serves its purpose

Si bien describe 6 piezas, la imagen es ambigua porque muestra otras masas que al final no llegan; después escribiré sobre la calidad