3D Printer Kit Clogged Extruder Nozzle .2mm .25 .3mm .35 .4mm .45mm .5mm 10pack bits for MK7 MK8 Makerbot RepRap Felix 3.0 3.1 Universal nozzle 1.75mm filament ABS PLA Will clear nozzles and produce finer prints Shipped in protective plastic case Japanese made tungsten carbide bits More sizes available