Product review (5 stars): Inexpensive quick fix for a noisy or broken fan
It moves air, and it is quiet.  I foolishly attempted to vacuum dust from the coils while the fridge was running, and quickly found myself with a 3-blade fan.  Unbalanced and quite noisy, and no local quick option, Amazon came through again with the product I needed and shipped quickly.  Replacement is a 5 minute job, including rolling the fridge out and gaining access to the fan.  With the fridge unplugged, the old blade just slips off and the new one slips right back on.  Quick repair and a lot less time and money than calling the repair shop.