The Art Primo EZ Cap is a FEMALE cap that is versatile and thin. It's good for outlining and detail work. It has a nice comfortable feel. This cap is pressure sensitive and fairly controllable. It feels like a German Outline 2 on a Molotow Premium can. This cap works on many spray paint brands that have MALE valves. We have tested it extensively on Rustoleum Painters Touch male cans with great results.