These are a bunch of RC Control Horns for Balsa, Foam, and Foamcore Model Airplanes. They can be flipped or rescaled to fit many applications.
iPRINT 3D, HATCHBOX, Tianse, etc. PLA, PVC, PETG
Black or what ever suits.
I used PLA for most prints with an extruder temp of 210ºC, bed temp at 45ºC, and fan at 32% after the bottom layers are printed. FR was set low to 50-60% to keep the small holes clean.
Clean holes with a number size drill bit to suit your model.