Gram Calibration Weight 1g 2g 5g 10g 20g 50g 100g Scale Calibration Weight Set for Digital Scale Balance and 1 Piece Calibration Weight Tweezer

Again-where would all the dart throwers be w/o the exact weight?

Needed to recalibrate my pocket scale and did the job with ease.

The fact these don't come with a storage box/pouch as others pointed out doesn't bother me. I rather save on price and have the weights be accurate. Good product. As someone else mentioned, this listing includes 100g, some others do not.

Here are the masses of these from a Mettler Toledo .1mg analytical balance scale:100 g : 100.00350 g : 50.000120 g : 19.998810 g : 10.00055 g : 4.99712 g : 2.00401 g: 0.9995So for my set the worst weight was the 2 g which was off by 4 mg and the 5g by 2.9 mg. The 50 g was only off by .1mg! The rest were also quite good.For $12 shipped, these are good deal. If you want high accuracy weights, they costs hundreds of dollars. Look at getting something like F1 class or better and be ready to pay a lot more.Anyone posting about these and trying to measure their accuracy with a $25 load cell pocket scale is likely going to be way off.

I used several scales (4 of them) for different reasons (two for my knitting and 1 for the kitchen and 1 that is just a general scale!) and I've never known if they were really accurate. Now I know, they are all accurate and all weigh these things the same! Since I often weigh my food, it was especially important to me to know that the kitchen scale was accurate. So yes, I am pleased with these and would recommend them!

Exactly what it says it is.

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Worked great to make sure I wasn't getting ripped off when I buy my veggies