1 Brushless Dc Cooling Blower Fan 4020s 12v 40x40x20mm B7

Awesome little fan. When properly powered by a 12V source, it produces a very nice amount of airflow. I used this to create an anti fog system on my airsoft goggles. Since this is a blower type fan it has great static pressure. Just whats needed for blowing air into goggles. This would not work to cool a large computer case. More so it would work to cool one specific component in a computer case.Edit: after a couple months I accidentally ripped a wire off. But I thought no biggie I'll just solder the wire back on. That's when I learned the board is super cheap. I just barely pulled on the second wire and it ripped a chunk out of the board before I could do anything. My recommendation is to hot glue the wires so that you can not rip them out. This motor cannot be repaired.

Surprisingly quiet for a cheap fan, even at 100%, worked for blowing cool air onto a chipset heatsink to cool things down a little bit, doesn't move a lot of air, but its not a big fan. if you need to blow air onto something and don't have a lot of room to squeeze a fan it, this one should work for you.

Not enough power. Was hoping for a little more air flow and it has very little.

Great little fan. I put it on my FPV headset to defog the lens. It does the job.

This fan does NOT deliver 20cfm of air!