Filament passthrough

These two pieces fit together to make a clean entrance for filament without binding. No glue or screws, just press fit together and they will not come apart without breaking. Jigsaw 12mm x 275mm or 1/2" x 11" gap in 1/2" thick wood for enclosure and then press fit- see photos. I made my enclosure out of ½" birch plywood from the Home Depot.