Review on Uxcell 6700ZZ Groove Bearings Shielded by Sam Simone

I bought these bearings for an RC project and they are my statement. The only issue I had was that one of the bearings wasn't as smooth as the others and turned a little rough. This wouldn't really be an issue since I was using it in a place that wouldn't be used all the time, but it's worth noting that it 'braked' a bit and had a rough feel when turning.