For more details about how I made this, check out my Hackaday Contest Entry - Repairs You Can 3D Print.
https://hackaday.io/project/57042-home-repairs-with-a-3d-printer/
Unassociated tags: extruder plunger, makerbot extruder, makerbot plunger, plunger spacer
Category: 3D Printer Parts
The author marked this model as their own original creation. Imported from Thingiverse.