High-production, extra-firm brush made of formulation of purple NylonPlus with purple and black nylon. Carries more paint to the wall. Cleans up fast. For all thick coatings like exterior paints or low VOCs. For hot or humid conditions. Round rust-resistant steel ferrule. Sealed maple wood handle. Bristle length 3-3/16″, thickness 11/16″. Width 3″.