E3D Hemera + Noctua 40mm + BLTouch for Ender 3 / CR20-Pro by mmario0706 - Thingiverse
Ender 3 (Pro & V2) Silent Fan Upgrade Guide with Pictures – 3D Solved
STL file Ender 3 S1 Dual 40mm Fan Hot End Duct・3D print design to download・Cults
Noctua Nf-a4x10 Flx Fan 5/12v 4010 Fan Cooling Fan 40x40x10mm 17.9 Db(a) Cooler Fan Radiator For Ender 3 Pro 3d Printer Parts - 3d Printer Parts & Accessories - AliExpress