These particular caps are FEMALE caps which are for the male valve system (Cans which have the stem sticking out of the can), and these caps are compatible with American Accents and Painters Touch / Painters Touch 2X. They create soft lines between 3 - 4 inches wide, comparable to and modeled after the New York Fat Cap. They are great for filling in large areas and flared lines! They also work on original Rusto Stops Rust and the satin "decor" lines, they work on almost all Rusto products EXCEPT the Rusto Universal Line (the cans with the triggers built in that look like fabreze). They have a direct fit, no forcing required, no slant, sprays hard and fast and even has that old school Rusto fatcap whistle.