Product review (1 stars): THEY ARE ABSOLUTE CRAP. I should have read the reviews more closely ...
DO NOT BUY THESE!!! THEY ARE ABSOLUTE CRAP. I should have read the reviews more closely but I was in a hurry and purchased these to rebuild the swamp cooler in our fire station. Just got around to installing them...Hmmmm...why won't the "bearings" turn?! What the hell? Are they mounted with pieces of styrofoam? What kind of crap is that? Oh...It doesn't matter because the inside doesn't turn anyways. In fact, it appears that the bearings are fused together so as to NEVER turn!

GARBAGE. DO NOT BUY THESE.

That is all.