From the Loftsmith community

70 mm window pipe end (copy)

Gives a 70 mm hose or duct somewhere neat to end at a window. The ribbed spigot grips the inside of the hose, and the flat rounded plate sits against the pane or frame. Change the hose size and the plate size to suit your setup.

1 part · 60 g · 160 × 110 × 50 mm