The 4mm Purple Nakadapt allows male valved paints such as Krylon, Valspar, Killz Upshot, and other male valve spray paint cans with a 4mm valve size to work with male caps, such as Astro Fats, Pink Dots, NY Fats, German thins, and all other euro sized caps. Most caps fit on the adapter. It works well with the larger stemmed Rusto Fats, NY Thins, and Boston Thins/Fats - However, you just have to firmly put the cap in the adapter before putting it on the can. It is a single piece of hard plastic, so there is no gasket to fall apart like some other adapters. It also has a unique lip that can make it easier to change from can to can. It can also be used alone as a splatter cap.
THIS ADAPTER WILL NOT WORK ON RUSTOLEUM!!!