Air duct for the rear fan of the Creality K1

Air duct for the rear fan of the Creality K1 printer.
Protects the fan from damage and takes air closer to the print head.
Attaches with standard screws.
Prints without supports.

The model has been replaced by a version with a reduced height.

Especially for those who have something wrong, I add the STEP model.
Change as you wish.