Natural, beavertail handle. Flat trim, white China bristle. Round edge, stainless steel ferrule. Professional quality paint brushes fashioned with a blend of nylox (dyed nylon) and polyester filaments. Only solid, round, tapered filaments are used in these brushes. Filaments are tipped and flagged by a special process to make them as close to naturally flagged bristles as possible. Brushes are effective with fine oil-based paints, stains varnishes, shellacs, lacquers and polyurethanes. For woodwork, furniture, marine or any other application that calls for an extremely smooth finish. XL brushes are recommended for both interior and exterior painting with all paints. The stiffness retention from the polyester content makes these brushes highly effective for exterior painting in hot and humid conditions.