Summary

These are joints for home made action figures ;P

This model can be printed without supports. Because already have.

You shoud remove supports after print. Be carefull when using knife ;)

The ball diameter is 16 mm and horns are 6 mm.

Also, M3( length 8~10mm) bolts and nuts are needed to assemble it.
( It's not handy, but make joints durable :)

Two models are same, but one is reversed. You can choose one that printed better.