Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month
It's made of solid material and I verified their exact weight with a calibrated scale with .000 precision. They all weighted exactly 100 grams.
Also, it's pretty compact so you're able to use it even on small portable scales, I personnaly always travel with one so I can prove to people my scale is correctly calibrated.
I don't really see cons.
Don't know about the other guy and the mixed up SKU, mine arrived in great shape.
Does the job it's intented to do. If you need to calibrate precisely a scale, buy some of these!
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