The gun comes set up with one tip that you select at order: a 1.4mm tip for base coats, clear coats, single stage, and light to medium viscosity coatings, or a 1.8mm tip for primers, sealers, topcoats, and heavier coatings. If you want both sizes, KBS sells complete 1.4mm and 1.8mm needle, fluid nozzle, and air cap sets separately, so you can buy the gun with one tip and add the other.