Upgrade for the  Ultimaker 2+ . Print speed increases 2 x with the  3DSolex matchless kit. The filament can be fed faster due to split feed channels. . RSB nozzles (standard type nozzle) 0.25 mm 0.4 mm 0.6 mm 0.8 mm Matchless x 7 1 mm 1.5 mm 2 mm 0.25 mm 0,4 mm 0.6 mm 0.8 mm