I took the original file and scale it on CURA until it fit the m365 inflator extensor tube. Last size I tried was 1.16 on all axes. Took the original on MeshMixer and change the dimensions with this scale 1.16. Here you have the modded file. You can always take the original file and scale it on CURA if it the modded one still doesn't fit your inflator extensor tube.
alargador_adaptador_scaled.stl | 113.0KB |