Wathai DC 4010 Blower Fan 24V Extruder Hot End Turbo Duall Ball High Speed 40mm x 10mm Radial Fans for Ender 3 3D Printer Cooling 2 Pack

I used this to replace the blower fan on my 3D Printer (Geeetech Mizar S -- the shrouded fan that powers up after the first layer is placed). It works great, and the extra-long cable was nice (I only needed a few inches of it; I cut and spliced it to the original, smaller connector from my faulty stock fan). I did notice it's a bit louder, though, as it is a more efficient blower fan than my stock; in fact, I had to drop the fan speed settings by 25% because it was causing some of my print jobs to warp by the 3rd or 4th layer drop. Not a complaint, as I've been printing for years now and am quite used to adjusting its settings, but keep that in mind if you purchase this for your own 3D printer. Recommended. Will update this if it prematurely fails (as of this post, I've only used it for two days now -- about 5 print jobs so far).

Very quiet and helps keep my stereo equipment cool

It definitely moves more air and this is probably do to the larger blower wheel than the other five manufacturer’s fans I have recently received to test for personal preference. It isn’t the quietest fan but it not running constantly unless moving air. Looks great and fits perfectly in printer.

Works great even in a 70C chamber. No issues so far.

These fans are great. I plan on plugging them into a battery brick and putting them into a car window while parked in the sun. I have rain guards on the windows and these are the perfect size to mount in the gap under the rain guards. The included power cord allows both fans to connect to one USB port and has a switch to turn it off and set to 3 speeds. I didn’t realize that feature was on the cord so I’m pleasantly surprised. The fans aren’t very loud either so I’m guessing it won’t be noticed by anyone walking past the vehicle while they’re in use. I will definitely buy these again to keep in my other vehicle.

Nice little fans using them for airflow in a terrarium. They provide Good circulation and i like the 3 speed options. They’re just SUPER loud. My 4” computer fans are half as quiet as these

These fans are resonantly quiet. You can buy quieter ones but they are 5-10 times as much money.Be careful in hooking theses up. There is no standard on the connector as to ground on the left or right. Reverse polarity can smoke a fan.I suggest putting a drop of red nail polish on the hub. That way you can easily see if it’s turning.

Easy peasy, super simple to assemble and operate.