Check the listing for details. .4mm .5mm .6mm 6pc 3D Printer Clogged Extruder Nozzle Cleaner Drill Bits. Condition: New. Listed at 8.95 USD. Accessories 3D printer J-head Jhead Print Head Nozzle 1.75mm 3.0mm ABS PLA Filament E-3D V5 V6 M6 Nozzle Clog Clogged Jammed Poor Print Quality Solution 3D Printer .4mm .5mm .6mm (2each) Extruder Nozzle Cleaner Extruder Head Cleaner 6pc For most nozzles, including standard and J-head nozzles! These Micro-drill bit Extruder Nozzle Cleaners are an essential item for any 3D printer owner. Every extruder nozzle must be cleaned out from time to time. These nozzles are very difficult to clean properly. These micro dtill bits are of the highest quality, made in Japan. They are the perfect tool for the job. By using these precision drill bits, you will extend the life of your nozzle and without a doubt, produce finer prints.