Summary

This is a universal spool adapter for the Robo E3 that will allow you to print with another supplier's filament spool. Easily printable with no support and easy installation.

3 Prong - Older Robo E3 spool holder. Look at the spool holder and check if there is 3 slots. This is the right spool adapter.

4 Prong - Newer Robo E3 spool holder. Look at the spool holder and check if there is 4 slots. This is the right spool adapter.