Just a simple bird feeder based on some jars.

The external diameter of the thread of the jar must be around 82mm.

I recommend printing several layers of thread to make sure the size will fit.

Each bird feeder lid is unique. Please use the dimensions of your glass jar and your printer's print area as a guide. If necessary, use a ruler to scale the lid.

inner diameter of the lid is 117 mm

If the inner diameter of the circle does not fit the glass jar due to a printing defect, gently heat the plastic and press it onto the surface.