QP Calibration Weights 1000G, 8 Pcs OIML Class M1 High Precision Scale Calibration Weight Set, 10G 20G 50G 100G 200G 500G Calibration Weight with Tweezers for Digital Scale, Scale

I bought these, like many others, to check the accuracy of my home scales. I checked them on our kitchen scale and if they were the exact weight as shown on them, then the scale said they were bang on. That's assuming that my kitchen scale is reading correctly. Either way they were close enough for me to use. I'm now using these weights to calibrate a 3D printed filament scale made from a 1kg beam load cell, an Arduino Nano board and an OLED display. Nice to get a good idea as to how much filament is remaining on the spool before committing to a print. Good value for the money.

This is a great set of weights for verifying the calibration of your kitchen scale. Probably not precise enough for drug prescriptions or use in commerce, but more than enough for use in cooking and mixing drinks. I tested the set on my new kitchen scale, and the weights were within 0.5%. I think it is a good buy.

10g = 10g 20g = 20g 50g = 49.8g #1.100g = 100g #2. 100g = 98.9g 200g = 200g 500g = 499.3 G These simply cannot be used for accurate weighing or calibration purposes. Return initiated.

Effortless from order to delivery - in Kenya! Really good and very happy with the product

I don't do many reviews anymore, for various reasons, but I wanted other potential buyers to be aware of some issues with this product. First and foremost, the plastic storage box these weights came in, had a miserable stench when it arrived. It smelled like the fragrance they mix with natural gas, so you can detect a gas leak. Additionally, just touching the box, left a heavy smell on my skin, that didn't want to go away. I had a hard time even washing it off. I can only imagine, what potentially dangerous chemicals this may have exposed me to. The box is also made of VERY cheap plastic, that likely will not last. The quality of weights is also not particularly great, at least based on their appearance. They look to be somewhat poorly made, with some lumps and divots on their surfaces. However, I checked them on TWO different fairly accurate scales, and they WERE pretty much dead on. I tried to manage my expectations, when ordering weights at this low price, and for the money, they are worth the cost. But in my opinion, they would NOT be sufficient, for someone doing high accuracy, lab/scientific type work. I purchased the weights to check the accuracy of coffee scales. This is not that critical, so they are good enough. And if the smell will go away, I am pretty sure I can live with them. I gave them 4 stars. I believe that, at this price point, it would be unreasonable to ding them too hard, over some relatively minor issues. And good weights, cost a FORTUNE! Hopefully this review will help someone...