The Rusto Fat is a classic cap. It produces a 2 inch line that is very opaque and can fill in a surface quickly and solidly. It no longer fits the valves on MTN cans, however its popularity is so immense that we continue to stock them. For use with the mayority of paint brands such as Montana Harcore, Montana Speed, Montana 94, Montana Gold, Montana Black, Montana Alien, Iron Lak, All City, Fresh paint. Works on Sect adaptor cap for Rustoleum spray paint.