American Weigh Scales Calibration Weight Kit WGHTKIT, Class M2

Received promptly. Weights seem to be extremely accurate with exception of 20 and 10mgs. Please note that my scale is by no means professional - "Infiniti" so it could well be my scale. Honestly I do not care as I do not even use such a small weights and generally needed weights to calibrate and verify the scale itself once per a while. Unless you are in pharmaceuticals I would definitely recommend this weight set.

I was sceptic for the respect of the class claimed, but after checking on the lab with a scale 5 digits (did the measure twice), I confirm it‘s accurate as it should. At the end, certification has a price... Good purchase!

nice kit but i got 2x 10mg instead of 2x 20mg. but i got 1mg that is not listed.i tested all the weight with a very precise scale (0,001). only the 50g is not very precise with 50,02g ... all the others are very precises.nice kit and yould recommend it.

Very convenient kit. Would be nice to know how accurate the stated weights are, and if the weights of the smallest items are at risk of changing over time (e.g. due to oxidation). Brit they're probably much more accurate than the scales I'm using them on.

Un excelente producto para mantener calibrada tu gramera/báscula y que debes tener sí o sí.El material del que están hechas se siente de buena calidad y su peso es exacto al que se visualiza.