Review on 🔌 WINSINN 40mm Blower Fan 24V Dual Ball Bearing 4020 40x20mm Turbo Brushless - High Speed (Pack of 4Pcs) - Efficient Cooling Solution for Electronics and 3D Printers by Nick Griffith

A bit noisy, but not bad for centrifugal fans. But move air! I use them on my 3D printers and they are some of the most powerful fans I've tried. I rarely use speeds above 60%, but with two fans running at 100% I can print overhangs with the Pla that I thought were impossible. Even better than two 5015 fans. My CoreXY printer's fans have been running for a few hundred hours and show no signs of wear. Very happy with them.