GDSTIME 2Pcs 50mm 5015 Blower Fan 24V Brushless Dual Ball Bearing Turbo Cooling 50x15mm 2Pin 39 inch Cable for 3D Printer Hotend Extruder

This is the one you want. Blow enough air to cool prints. Don't get those cheaper ones or the silent ones. Get this one and set the fan percentage to whatever fits your need.i don't think there is a lot of 12volt fans out there that can move as much air as this.noise level is ok. Not silent but not as loud as the original anet one.

Bought these for a 3d printer. These things are NOT quiet at full speed, but they push A LOT of air.That said, you really do not need to run them at full speed, and probably actually shouldn't. They push A LOT of air for their size, and I found that at full speed I was getting GREAT overhangs, but my layer adhesion was suffering, i believe they were cooling the filament too fast. Cut fan speed down to 50% to 75% and have been getting great results with much less noise. haven't run an overhang benchmark again yet, but I am pretty pleased with these fans.The cords are also nice and long, I can;t imagine too many people will have problems getting them hooked up unless your rig has super long cable runs

Definitely works well and provides much improved cooling over the stock Ender 3 cooling fan. Definitely louder so I only run it 50% speed while printing normally and 100% speed for bridges.Knocking down one star because I specifically purchased these because they said they had long cables to reach the mainboard from the print head. But in my setup, they were about 6 inches too short so I had to break out the soldering iron anyway.

You're probably thinking "It's just a fan, it doesn't matter" and looking for a cheaper option. I know because that's exactly what I did. My Stealthburner was working fine, but I was not impressed with the print quality. I tuned and tweaked and nothing was helping. I was having massive cooling issues, and even dropping the temps to under 200c on PLA did not help, and bridges? Forget about it! I was going nuts trying to figure out if I had a leak or if the fan wasn't getting enough voltage, until a Discord member asked if I was using a Winsinn fan.Desperate for any solution, I ordered GDSTime 5015s and 4010s at the recommendation of several members of the 3D printing community. It hurt a little destroying a fan that I just unboxed but I got it in the Stealthburner and threw a hot Benchy at it.All my issues were instantly fixed.These fans are no joke. There is a clear difference in pressure and flow compared to the Winsinn models. They also have a more tolerable sound profile, as the Winsinns like to whine once they spin up.Every 3D printer I own will have GDSTime fans, and I am working on retrofitting my other printers.You can't go wrong. In my mind, there is no other option. It may be just a fan, but it truly does matter, and when it matters, I'm using GDSTime.

I tried the fans as soon as they arrived and the performance is better that what I spected, the power, for the size, was great, and silent.

I bought these 5015 fans as they are ball bearing. I installed one on a V6 hotend for parts cooling in a direct drive setup. Although they do work, the vibration in them causes artifacts in the prints. So I cant use them for the hotend. They do push a lot of air which is good.

so there are to things that make this an above-average deal. first, these are ball-bearing fans, which means they will last a lot longer than sleaved bushing / bearing fans and run more efficiently. This brings me to the second point, that these fans give higher airflow than other similarly priced fans with slave bearings. ... if your looking for a quality fan at a good price, these are the ones to get.

Mounted both of these in my absorption RV refrigerator to circulate air and increase cooling . The temps inside are much lower and I was able to lower the temperature settings two notches and still maintain below zero temp in the freezer. The only negative is that they are a bit louder than expected.

One fans is working great the other one has strange noise and i cant return because i solderd new connector seller should refund me half of the price