Filament spool with indicator

Not exactly my design, but I couldn't find the original.
This is a slightly reinforced version of the coil with an indicator of the remaining plastic(100-400 meters). You can use 2 or 4 M5*65 screws for Assembly. It can be used on bearings or with a bushing (see my designs).

Printing each half takes about 4-6 hours and requires about 35 meters of plastic.

Sources are attached. Modeled in Autodesk Inventor.

Edited 22.10.2020. Increased the diameter of the m5 screw holes from 5.5 to 6.1mm