I wanted a 40mm version of https://www.thingiverse.com/thing:1972504 so here is a remix.
Holes have been adjusted to suit the smaller size of fan and widened slightly to 3.5mm.
Printer Brand:
Creality
Printer:
Ender 3
Rafts:
No
Supports:
Yes
Resolution:
0.2
Infill:
30%
Category: 3D PrintingThe author marked this model as their own original creation. Imported from Thingiverse.