WINSINN40mm Color LED Fan 12V Hydraulic Bearing Brushless 4010 40x10mm - High Speed (Pack of 4Pcs)

i bought these fans along with the blower type , they where amazon recommended . having always bought creality before i would give these a try .anyone into 3d printing will know " the tissue test " where you see how far a fan blows a strip of tissue as a measure of the air being moved , well i can say these fans you can actually lay a strip of thin tissue on the output side of these fans as they run and it will sit there hardly if not at all moving . absolute rubbish . fans like these will lead to damage to hot ends and cause heat creep .i bought the same type but with dual bearings they seem ok thus far , time will tell .but as i said i returned these and the blower type ones i bought at the same time , i was not about to throw around £30 away on these useless fans . oh and there is no mention of the mA needed to power them very strange too high and bang goes your main printer board , too low and bang goes the fan .i will avoid this make now . very under powered .

Fitted 3 so far and 1 of them does not work, it was dead on arrival. The LED's come on but the fan does not rotate without assistance. Poor quality. Unable to return as this would mean having to take the other 2 that are already fitted out.UPDATE 9th Oct 2021: Another one has now started to fail whereby it does not always spin when power is applied unless assisted.UPDATE 18th OCT 2021: The LED;s on one of the first two fitted have started to flicker.So far, 1 was dead on arrival, one only starts intermittently and one has faulty LEDs. I won't even bother fitting the forth one as it would be a waste of time. Waste of money.

Bought to replace the hotend and motherboard fans on my Voxelab Aquila 3d printer. Absolutely transforms the printer in terms of noise. When my PSU fan is not spinning, these fans are practically silent.I have had no problems with airflow or heat creep either. All my prints are coming out perfectly, and after a PID tuning, my temperatures are holding solid.Note: The motherboard fan is just plug and play, but replacing the hotend fan requires some very simple soldering. Not hard at all, but worth pointing out to others.

The fans were easy to fit - direct replacement. Cable I would say was a bit too long, but easily rectified.The problems came in use. If you are using therse for cooling a 3d printer hotend, please look elsewhere. They dont run well, and the first fan I fitted started speeding up/slowing down - you could first hear it, then as it got worse, you could actually see the fan stuttering.Replaced it with one of the others in the pack as I thought, everyone deserves a second chance, might have been a problem with that one fan. No - it wasnt - the same for the second with worse results. Very disappointed - and now the return window is closed. If you need reliability, I wouldnt risk this - especially with a longer or overnight print that might mean you wake up to spaghetti or worse - a completely blocked hotend, with heat creep that destroyed filament guides etc - as I did.

Bought these to replace hot end cooling fan on an ender 3 pro. Fit was exactly like original and cabling was a simple splice Into current wiring loom. Fan is significantly quieter than stick and I’ve had issues with heat Creep or hot end temp not being stable.All in all a superb replacement for the stock fan! RGB too!