Premier Montauk 2-1/2 in. Firm Angle Sash Paint Brush are made in the USA. They are handcrafted with a firm blend of 100% DuPont Tynex/Orel (Nylon/Polyester) filaments. Formulated for use with all interior or exterior latex and oil-based paints, stains, primers, and polyurethanes. Constructed with a stainless-steel ferrule and a chiseled edge for ease of use.