Montana Gold caps can be interchanged to get the right spray width for your artwork. This 18 cap set comes with a Standard O cap, a Skinny Black cap, a Skinny Beige cap, an Orange Fat cap, a Pink Fat cap, a Ma'Claim cap, a Calligraphy cap, a NYC fat Cap, an Outliner cap, a Needle cap, a Flatjet Wide and Flatjet Medium cap, as well as all 6 Green caps- from Ultra Skinny to Ultra Wide. Make the most of your Montana Gold spray paints!