Ultra/Pro Extra-Firm Jaguar Wall Brush, made with Woosters exclusive Nylon Plus, plus more stiffness. Tested in 45 different paints, they have proven superior capacity and release. Ultra pro Extra firm brushes maintain a sharp edge and clean up fast when done. Perfect for all thick coatings like exterior paints or low VOCs, hot or humid conditions, and whenever a painter wants a high production, extra firm brush.