This is obviously a simple spool for filament samples, it will take a 50g sample completely with some room left.

There is multiple holes in different location to easily get the filament started on it and even more to lock it's end when not in use.

You will need 3x #4 x 3/8 or 1/2 sheet metal flat head phillips screws to assemble the two parts.

I hope it will serve you well :)