Review on 🔧 Coolerguys 12v Ultra Quiet Fan: Ideal for Pi Devices, 3D Printers, and Microelectronics (40x20mm) by Glen Elevyn

The fan is quiet and provides enough air to cool my project. The only criticism I have is that the screw holes are set back almost an eighth of an inch for some reason. If you use standard fan screws and mount slightly larger than mm. Fat, you're going to get in trouble. I installed it on a 0.2" thick aluminum plate and had to countersink the holes in it about 1/8" to allow the threads to engage the fan.