Simply take off the existing nozzle and replace with the desired nozzle width. Pack contains 1 each of the following: Ghetto-Blaster Chisel cap (clear), an ultra wide fat cap with adjustable fan angles for more creative control. Gives the use the ability to create thick or thin lines, Cyclone Fat cap (blue), the most versatile, capable of high output to quickly cover large areas, Widow Maker Fat cap (black), perfect for filling large areas and fading effects, Vegan Skinny cap (pink), for fine detailing and 2 each Sharp-shooter Super Skinny (green) for the finest of details.