Snap on hot end fan for e3D V6, uses a 40mm fan.

This fan duct snaps on easily and holds on until intentionally removed. I actually have 2 Noctura fans mounted and it has never fallen off. Enjoy
Ah, yes, forgot to mention. If is shows up very tiny in your slicer, scale it up by 2540 % and all will be good. This was drawn in inches and when it exports to .stl the file get converted to mm, which scales is down 2540%. The converter interprets 1 inch to be 1mm, ect. ect.
Thank you to those who pointed it out.