4 Inch Duct Wall Pass Thru

Needed an attractive looking pass thru for my paint booth to the exhaust in the other room. Designed for 3 inch studs in wall, but made so would work with thicker walls. The coupler keeps the two inserts together inside the wall. The pieces fit together very snug, but no sanding should be required. PDF explains the parts and easiest way to assemble.

Found the Duct plate had two models in the .3mf. Fixed and also increased outer diameter of plate duct to minimize lip around 10mm up. And changed all to 0.2mm Quality profile.