3D Printer Clogged Extruder Nozzle Print Head Kit .2mm .3mm .4mm bits (2each) + Pin Vise BIT HOLDING TOOL + (1 each) Nozzles .2mm .3mm .4mm MK7 MK8 Makerbot RepRap Felix 1.75mm filament ABS PLA Will clear nozzles and produce finer prints Shipped in protective plastic case Japanese made tungsten carbide bits 4" comfortably held nozzle cleaning pin-vise tool 3 quality brass nozzles: sizes .20mm .30mm .40mm