3DP12 - Plunger Lock 2 for ADDME printers.

This part is designed to fit with a standard 3mL syringe plunger, and prevents the syringe from moving in the heating jacket during print retraction.

It forms part of an assembly with:

3DP11 - Plunger Lock 1 - https://www.thingiverse.com/thing:3339292
3DP14 - Extruder Backplate - https://www.thingiverse.com/thing:3339297
3DP15 - Extruder Motor Holder - https://www.thingiverse.com/thing:3339305