WINSINN DC 25mm Fan 5V 2510 Hydraulic Bearing Brushless Cooling 25mmx10mm 2PIN (Pack of 5Pcs)

I purchased these 25mm x 10mm fans for my older Robo3D R1 3D printer. The small hotend fan had been going out for some time making this awful noise when you powered on the printer and then would go away after some time. The old fan was also extremely loud even after the squealing noise went away. I tried the oiling the bearing as you will find on many YouTube videos but the repair was short lived and didn't do away with the loud fan sound.The connector on these fans didn't match mine which I knew when purchasing but removing the female pins from the connector body is relatively easy and I knew I could swap connectors from my old fan to the new one.After connecting everything up and powering on the printer.. Wow what a difference in the noise level, much more quieter and the air flow seems to be the same if not better then the original fan. The fans came in a nice little clear box which is great for keeping the others together if I should need in the future. I can't speak for longevity as I just put one in few minutes ago but at this point I would still recommend them if you need to replace your hotend fan that's dieing. Well worth the small cost in my opinion.

WINSINN makes nice fans. I've used this with 9 volts and no issues.

It is not a fault of the product, or the seller, but of the buyer if he expects to find the same air flow as with a larger fan. It's very weak.

They come with long power wires, I didn't need them so long but simply cut and soldered to my desired length. It is important to keep the connector on the wire as it is fully crimped and stays on well. If running at alternate speed, the number of fan blades and thier angles will cause varying levels of noise. I ran mine through a TO-90 FET 300ma transistor to make sure I don't blow any channels in the ESP32, very easy to interface.Mounting holes are well aligned (some other fans are not and user needs to adjust the case holes). Noise at full speed is low.Very good seller (lots of variation in product line).Thanks

They work, but they don't blow much air. I should have paid more for a similar item and shipping from a different marketplace. My fault.

So far so good. Only used one so far, hooked up to a raspberry pi case above a heat sink and at this point I have not seen any issues. The pin connector hooked up easily to the GPIO pins on the board. Upon visual inspection the other fans looked fine but I haven’t powered them all up yet. Noise doesn’t seem too bad, after about 4-5 hours of running the fan

Good value for the money. I am using this through 12V, and they are silent. I was expecting fan noise, but to my surprise they are very silent. As far as how much ir ir can push, well these are tiny fans so you should not expect much, but works just fine for my application. using them in chain works much better to throw more air.

Disappointing to say the least. Barely over a month old and one of them is getting loud and sounds like I will need to replace it.