Features: Color: Silver Material: Stainless steel Functions: Special cleaning bit for printer nozzle Quantity: 5pcs/ Barrels Specification: 0.15mm,0.2mm,0.25mm,0.3mm,0.35mm,0.4mm How to use: Clean the plug method: Heating nozzle temperature 1. Put nozzle temperature manual adjusting to 240 , remove front fan, after the temperature arrives, manually to the feed pipe kneading silk, to make the nozzle out of the wire properly. Then pull out the glue wire, and then enter the feed throat, wait a little bit after the silk melt, pull out the glue wire, make the half melted glue wire to take out the residue in the nozzle, repeat the operation several times. 2. Use corresponding nozzle size of steel wire or drill bit to clear nozzle. Then repeat process 1. 3. Remove the nozzle and clean it in acetone solution. Because the acetone solution dissolves the plastic,therefore the nozzle can be put into the solution to cooperate in the process of 2, because the acetone solution is a chemical liquid, the process of claiming that we bring a special protective gloves. Packing include: 5 x 3D printer nozzle cleaning needles