Here only test files.
ALL FILES HERE: https://www.redpah.com/product/4069/ (with a small contribution)
With this special spool holder, the reel of filament rotates almost without friction and
REDUCE THE EFFORT OF THE EXTRUDER MOTOR.
Thanks to the quick lock-unlock system and the LENGTH OF 70 mm, it is suitable for all types of Zortrax reels: old, very old and new.
Screw countersunk head (1): 4.8x19 mm
Layer: 0.19 mm (0.09 mm for Rotating Cylinders)
Material: Ultrat or ABS or Hips