The 3Doodler nozzle set is a changeable nozzle set designed to store your nozzles and supercharge your creative powers! Upgrade your doodling experience to a whole new level with six new, exciting nozzles and an included smoothing tool to control the variety of designs and flow of plastic When doodling! The nozzle set comes with a handy tool to store your new nozzles and is available in a variety of shapes and sizes, such as ribbon, square, and triangle, and 0.5mm, 1.0mm, and 1.5mm.