This set of 18 male caps can be interchanged on spray cans with female valves to get the right spray width for your artwork. Make the most of your spray paints! Compatible with Montana, Belton, and Ironlak. Some lines from Rustoleum, Krylon and Valspar are compatible with these caps, but not all - check that your cans will accept male caps before purchase. This set contains 18 caps manufactured by Montana: Standard O, Skinny Black, Skinny Beige, Orange Fat, Pink Fat, Soft Grey/Blue, Ma'Claim, Calligraphy, Needle Medium Liner, Needle Fine Liner, Flatjet Wide, Flatjet Medium, and all 6 Green caps- from Ultra Skinny to Ultra Wide.