This is my design of a birdfeeder squirrel guard.  Installed on a 25mm dia. post.  Total diameter is 400mm.  So, if not scaled, a part is 200mm long.  I printed 4 of this part with 420g of translucent Nefilatek PETG filament on my Voron 2.4 300.  Nozzle 0.6, Layer height 0.3.  I suggest a brim.  It tooks 12 hours. Assembly requires 4 M3x12 bolts with nuts and 2 O-rings or a piece of copper wire twisted or other clamp to old the assembly to the post.  I made grooves for these.