About this 3D model

This bird feeder attachment can help deter house sparrows, which are an invasive species in North America. A small length of fishing line or string is attached to the four arms. These deter house sparrows but not native birds. The hub has two parts (in one mesh file) that print in place. The inner part spins to lock onto the cable or cord that hangs the feeder. I used some random small nuts as weights on the end fishing line; anything comparable will do.