They do the job

I've been using these fans for the past 3 months now. My only complaint is that 1 of the 5 rubs the fan case so that I get a super obnoxious sound. The fan doesn't appear to struggle turning still but that sound alone is enough to make any sane person crazy. Unfortunately, the rub started up consistently right after the return window closed so I am stuck with an annoying sound or no 5th fan.

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