WINSINN40mm Blower Fan 24V, 3D Printer Micro 24 Volt Fans Blower 4020 Dual Ball Bearing, Brushless Cooling 40mmx20mm 2PIN (Pack of 2Pcs)

These fans are horrible. I was going to use them for a 3D print head, but they sounded like a miniature jet engine and had horrible vibrations. I could tolerate the noise, but thr vibration was severe, and it would not work for my intended use. I ordered a recplement set, but they were also very loud and shaky. Ended up returning both.Avoid these fans if you don't want noise or vibration. It seems like every fan (including some 3010 and 4010 box fans) I have gotten from this seller has been really poor quality. The performance needed just isn't there. I would buy noctua fans if they made 24V models.

Fans both worked but the wires on them both broke off in very short order at the circuit board under the stickers. I'm pretty decent at soldiering so I replaced the wires with better quality 24ga silicon wire which solved the problem but its a bit small and fiddley to do if you don't have good soldering iron and a steady hand. If you can't solder shop elsewhere they really are not that good even the dual row bb ones. Problem is there is little choice unless you want to pay $20 a fan from somewhere like digikey or wait a month for something to come from china that might be the same crummy quality. I will say they do blow air fairly well and if you keep them around 50% of their max rpm they are liveable until you can get something better for your 3d printer. They fit the vorob 2.4 print head perfectly btw

This thing blows like it says but is much louder than original from 3d printer. I know they claim to use dual ball bearings but that is not evident without tearing it apart. The standard 40mm fans that claimed to have dual ball bearings (same brand) died in less than a month of use and upon disection no ball bearings were found just the standard bushings. This blower has lasted several months so maybe it does have the ball bearings but... All in all I give it 4 stars. Price was good but noise level lost it a star.

Got this to replace the one that came in my Elegoo Mars 2 Pro resin printer. Why do the boxes printers come in last longer than the original fans?This fan seems quieter than the stock one. It works. I would buy them again.

I used this as a replacement for a fan inside my CR10-S Pro. The only thing to be aware of is that the wires are reversed on this compared to the fan from Creality. It was easy to snip the wires and reverse them with the connector. But if you don't take this step, the fan appears to be dead.