Foam Board (22x28) $1.62 - tinyurl.com/3duv9jch
Craft Glue (E6000 or similar) $3.18 - tinyurl.com/3duv9jch
Exacto Blade or another suitable utility knife
Filament (PLA suitable for indoor use, use PETG/ABS for outdoor gates)
2 Inch Cutting Jig - Use this to cut the foam board along the shortest edge to create 14 strips. This is enough material for 3 gates and 2 extra pieces for mistakes.
45 Degree Cutting Jig - Use this to cut the foam board at 45 degr45-degree angles for insertion into corner brackets.
Air Gate Corner Bracket - Print 8 per gate.
Wall Mount - Print two.
Gate Linking Bracket - 2 per individual gate
Use high adhesive craft glue to align cut pieces at 45-degree angles and secure them within the corner brackets.
The author hasn't provided the model origin yet.