Filament feeder will enable you to use a standalone feeder of filament. This application can be used for either 3D printer or 3D pens. The spool rolls on 4 V-shaped rollers with closed Z bearings. Rollers are fully adjustable and will adapt to any spool width. This product also comes with a center rod if center location of the spools is preferred. Finally, a filament positioner is included for better guidance of filament. Filament, cabinets and printers displayed are not part of this purchase.