5pcs 0.3mm 3D Printer Drill Bit Nozzle Cleaning Tool Kit

How to choose: You can choose a drill bit that is same size or one size down your nozzle, for example, if you had a 0.3mm nozzle to clean, you can buy a 0.3mm or 0.2mm drill. Size to choose: 0.15mm cleaning needle: total Length 50mm/1.97",Bit Diameter*Bit Length 0.15*25mm/0.006"*0.98"; 0.2mm cleaning needle: total Length 50mm/1.97",Bit Diameter*Bit Length 0.2*25mm/0.008"*0.98"; 0.25mm cleaning needle: total Length 50mm/1.97",Bit Diameter*Bit Length 0.25*25mm/0.01"*0.98"; 0.3mm cleaning needle: total Length 70mm/2.76",Bit Diameter*Bit Length 0.3*40mm/0.012"*1.57"; 0.35mm cleaning needle: total Length 90mm/3.54",Bit Diameter*Bit Length 0.35*60mm/0.014"*2.36"; 0.4mm cleaning needle: total Length 85mm/3.35",Bit Diameter*Bit Length 0.4*50mm/0.016"*1.97".