Standard size bearings are incredibly difficult to install. I was worried I got the wrong size and it's not clear on their website if they need smaller bearings as Bont makes them and I have standard size axles so there was a lot of confusion but it turned out that I had to use a real bearing press to put it in and luckily my league has one because the tools I have at home and the elbow lube could NOT cut it out. Also, I bought two packs and each has one that doesn't light up so I don't know if the magnet got damaged trying to install the bearings or if they're faulty overall, but overall a little underwhelming to the imagination. Aspects of the product, but the quality of the impeller itself is good.
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