WINSINN 50mm 5015 Tiny Cooling USB Blower Fan 5V, 50mm Micro Mini USB 5 Volt Fans Blower Turbine Turbo Hydraulic Bearing, 1000mm/39in Cable Brushless Cooling 50mmx15mm (Pack of 4Pcs)

I constructed an outdoor artificial fireplace and needed a small fan to blow the ribbons behind the screen, and the ordinary flat fans did not give off the desired effect, got these and they did the trick, it’s amazing how real they make the fireplace appear, without them it’s just a bunch of blinking orange and red leds.

Great for modding my 3D printer part cooling system. Lightweight, good airflow, and relatively quiet. Plenty of cable length foroat applications and I had no issue trimming down the cables for my use.

These fans work fine, but for 3D printing where the print head moves rather fast the motor shafts have too much play in them, resulting in some clicks when it's moving. They get underclocked to run at 40% to provide the same cooling levels as the 4015s it replaces, so they're nice and quiet when the machine is cooling down. The clicking noise is driving me crazy though.

yep! these are blower fans that work just fine. i’d get these again if i needed more of them

I needed a lot better cooling for my Vyper. I printed out a new cooling duct setup from cults3d. It uses these 15xs5 fans over the stock 10x40 fans. One of these fans puts out more air than both the stock fans. With two fans blowing. I get so much less stinging.

Overall, they work very well, as long as they are not in a vertical position and not on a moving device. These things rattle like crazy, the fans make micro vibrations on the fan chassis. Don't use these for your 3D printer, they're noisy. For stationary applications, go for it.Other than that, its a good 5015 fan that runs quiet (when not in vertical position) and has good CFM.

The product is fine. I'm using it to cool a voltage boost regulator. The only thing I disk my like was they were all tied up together. The connector doesn't make it easy. It took more took time releasing the knot than scissors soldering it.

Mighty worth all 4. Cooling all my equipment.