These fans work fine. I used one on the V6 hotend that I installed on my Ender 3 and the other for the circuit board fan in my case. They are not silent, but much quieter than regular ones. The only thing to note is that the terminals on the ones I received were mini JST, but as I have a JST crimp kit this wasn't an issue.
Unleash High-Performance with AMD Ryzen 5 3600XT Processor & Wraith Spire Cooler
223 Review
Deepcool GAMMAXX 300 CPU cooler, silver/black/blue
166 Review
AMD Phenom II X4 940 π» Black Edition 3.0GHz AM2+ Processor - Retail
96 Review
π¬οΈ Silent Cooling Power: Dark Rock Pro 4 CPU Cooler with 250W TDP, BK022
134 Review
π§ Premium Repair Replacement Screws & Tools for MacBook Pro Retina 15"/13" - Complete Bottom Case Set
10 Review
π₯οΈ Helifouner 450-Piece Computer Standoffs Spacer Screws Kit: Ideal for Hard Drive, Motherboard, Fan, Power Graphics & Computer Cases
10 Review
MacBook Retina 13-inch (A1425, A1502) and π© 15-inch (A1398) Bottom Case Screw Set with Pentalobe Screwdriver
11 Review
36-Pack Black Rubber PC CPU/Case Fan Screws/Rivets Set for Computer
11 Review