Review on Upgrade your Skateboards with High-Performance Donepart 608ZZ Skateboard Bearings by Mark Hamblin

I don't use them as skate bearings but more in projects I like DIY 3D printers, CNC machines etc. Like other brands they came together in a little plastic tube. Unlike some others, they didn't swim in oil. Also, the tolerances seemed good in the sense that there wasn't a lot of play, which is good because I feel like some others with ads and an ABEC rating, but there's no way they can really stick to that . These camps did not last long. relax", but they are not the kind that will spin freely. That's fine for my applications - I'm looking for tighter tolerances and longer life, not speed or freewheeling. Overall very happy with them and would use this brand again for a repeat purchase.