Spring Adapter (increase preload) for 3D-Printer feeder

An Adapter for increasing the preload of your feeder.
This could help if your feeder isn't feeding anymore, because the friction forces are too weak.

Dimensions:
Spring-Side: 8.3 mm
Fitting-Side: 5.7 mm
Preload Length: 4 mm
Outside Diameter: 9.3 mm
Overall Length: 7 mm

Tolerated for 0.4 mm nozzle