Warn up the nozzle, then press the lever and pull the filament.

warm up the nozzle, press the lever and sink the filament until the new color come out of the nozzle.

If the end of your filament is fragile, remove the breaking part and start again the operation.

You can use PLA, ABS, PETG filaments, wood-based, metals-based and carbon-based filaments (we recommend the inox nozzle for metals and carbon)