WINSINN 50mm Blower Fan 12V 5015 50x15mm Turbine Turbo Brushless Cooling for DIY 3D Printer Extruder Hotend MK2 MK3 MK7 MK8 (Pack of 4Pcs)

I tested only one so far, others are spare. Works great. Edit after futher testing : I have compared it to others fan of same size with respect to flow and static pressure. This blower is indeed the quietest but provides the lesser flow and pressure. I recommend it only if you need low noise and that you dont need big airflow performance. For 3D printer, if the airflow is not too much restricted and the fan not too far from the object to cool, it is totally fine. Direct blow without fancy air duct is best. In my application where i need the airflow pushed though a filter, this blower is too weak so i will use others.

Small but powerful, I use them in my fursuit heads.

Rather than thrown out my daughter's humidifier, I chose to get these fans and was not dissapointed. It was the exact fan (other than brand name) that had been used initally. After installing it with the plug in the wrong polarity, I flipped the plug and the humidifer worked perfectly. It's not a silent fan, but the original one wasn't either. Great job keeping the humidifier out of the landfill! I also have 3 for other purposes. Maybe I'll get a 3D printer ;-)

Los uso para varias cosas y les agregué un regulador, son perfectos, pero si ruidosos, aun así cumplen lo necesario y más para mis necesidades. El uso principal es para una cámara web y una caja de madera con equipo electrónico.

PS4が通気性の悪い所にあるため、夏は表面が熱くなるので、追加の冷却用で購入た。とりあえず2個本体の空気取り入れ口につけたが効果は充分で表面が熱くならなくなったので満足です。