Laser Engraver or 3D printer enclosure Magnetic Window Screen Vent 3" duct

This gadget is to attach a 3" vent pipe to a window screen.  It is magnetically held to the screen to keep the vent hose in place during laser engraving, or any other vent need you may have.  It is held in place with 8ea. 6mm x 3mm magnets available on many sites online.  I also included a little duct that can be attached to the outside vent to route the air in one direction. I glued it to the outer vent attachment. There is a small shoulder on the outer vent to accommodate the duct.  This may not be necessary on your setup, but for us it allows us to vent the air down and out of an awning window. The outside diameter of the duct attachment is 73mm.

I have four files uploaded, one for both sides of the duct with magnets, one for the rounded top deflector and one for a wedge deflector.  

This printed fine without supports, but probably should include a brim on the vent deflector part.