GDSTIME 2-Pack 50mm x 15mm Blower Fan 12V 5015 Dual Ball Bearing DC Brushless Cooling Turbo Fan 2 Pin 39 inch Cable for 3D Printer Accessory

I got them to evaluate for use on my 3D printer. Way too loud! They do move a lot of air though. But even at the lowest PWM speed possible on my printer they were still way too loud for me.If you don't need quiet fans and want a lot of airflow, these would be great. If you are at all concerned about noise level, these are not the fans for you. The sound is pretty much a "whoosh" airflow sort of noise at least, and not an annoying high pitched sound like some 5015 blowers make.

The first fan I plugged had a weird high pitch noise. Like a coil whine. It went away on its own as I increased the RPM. However, the second fan suffers the same problem that doesn't go away. Airflow is good overall. Definitely a hit or miss with questionable quality.

Wire is comically long, just over a yard. Speed control is quite good. I can go down to 5% on my 3d printer. Obviously noisy but it's a blower, I got it for airflow not how quiet it is. Bearing sounds fine. Time will tell how long it lasts.

used this to upgrade my Voron Afterburner to the BN5015 mod, fits great, but have to run at 40% max duty cycle since my system is 24V. Regardless, these are way cheaper than the other suggested fans for the mod, and actually work when driven with PWM (got some cheap 5015's from Digikey, but they didn't work unless they were running at near max duty cycle

Good: noise level is okay given how much air they move (which is a ton).Bad: the wires came off on one of the two motors, so I had to solder them back on.