Cleaning filament will clean your 3d printer head quickly & easily. This 100 gram packet which will last you a VERY LONG TIME! Excellent to clean the head system of debris thats stuck inside the hot end & nozzle. Please read this article on how to use cleaning filament with a cold extrusion pull. Simply extruding this filament through the head will help clean it, but is not enough to get the best clean. Please follow the above article for better results.