120mm x 38mm Cooling Fan 110V 120V Dual Ball Bearing High CFM 3000RPM with AC Plug and Aluminium Alloy Frame

I’ve been building DIY air purifiers for my 3D printing room (see photos) and thought I would try this GUIANDJING fan as it seemed to have substantial airflow in the 120mm size.This fan is very solid and heavier than it appears. It seems well build with good bearings that allow the fan to free-wheel for 35 seconds when power is turned off. It moves a lot of air, much more than any of the other 120mm fans I’ve been working with.As another reviewer stated, be careful of the blades if you don’t have the guards on both sides. The blades are sharp and move very fast.A couple of things I found that dropped my review to 4 stars are: 1. the stated wattage is 38.5 watts, but I couldn’t get a draw of over 22.4 watts (see screen-print), 2. there is no power switch so when you plug it in, it is on (watch your fingers). I’d like to at least have an on/off switch, if not a power level/speed switch (lo/mid/hi).Overall, this is a very good fan and depending on your needs, you will likely find this to be a great value.