Filament Bobbin for small amount filament using at 3D Robo

This Bobbin has been designed for small amount filament that was not shipped with bobbin.
For printing at 3D Robo or other we need to get certain bobbin for it.
Usually it may not necessary for create because frequent use may have empty filament bobbin already.
It was trial for create 3D design
It has hole for 1.75 filament