By using just 1 section of Argyle Purge Filament, you can extend the life of Fortus® Model and Support tips by up to 3x or more! Simply run the filament manually through the inside of the tip to clean the melt chamber and tip. It removes carbon build up and saves money. 1.75mm diameter (1 bag of 10 x 8" pieces). See more in our Best Practices page.