A filament feeding device (100) for use in 3D-printing comprising a first feeding wheel (110) configured to rotate with a first rotational shaft (112) and a second feeding wheel (120) configured to rotate with a second rotational shaft (122). The first and second feeding wheels (110, 120) are separated by a separation distance so as to allow feeding of a filament material received between said first and second filament wheels (110, 120). The filament feeding device further comprises an adjuster element (130) movable between a first distinct position (130a) setting said separation distance to a first predetermined distance, and into a second distinct position (130b) setting said separation distance to a second predetermined distance, and wherein said second predetermined separation distance is larger than said first predetermined separation distance. Further, a 3D-printer comprising such a filament feeding device is herein disclosed.