Review on Nylon Power Transmission Products: Groove Bearing Fidget Spinner for Enhanced Fidgeting Experience by Brian Garrett

Bought these 2 packs of these bearings to replace the stock ones, which came with my spinner ATESSON.The first spin with this bearing I ran almost 10 minutes, as quiet as it gets!Now a week later, with random spins, the bearing is loud, penetrating wind noise and barely lasts 6 minutes. These bearings don't have the durability I was hoping for either that or the set of 5 bearings I received was below par.