Connector for 4 PVC pipes with an outer diameter of 20 mm. I have an internal diameter of 17.56 mm. Planting pipe turned out perfect. I use this connector for a folding crosspiece of a magnetic antenna, which would be easy to disassemble and transport.
I recommend to print on the height settings of layer 0.2 and fill 20% or more. My settings are given for the printed model, which I needed to make quickly.