Geetech Prusa i3 A8 Filament Roll Adapter

This one fits for the HERZ Filament Rolls. Due to i´m new to 3D Printing i don´t know if it´s suitable for any other brands. I created this thing because the things i found all were solid and took a long time to print. This one was finished in around 2 hours. I am using it and it works great for me.

The outer diameter is: 51,9 mm, the inner diameter 10 mm