Purdy's XL series is the most versatile brush series, designed for use with all paints and stains. The XL series has a distinctive copper ferrule with the right blend of dupont solid, round and tapered tynex and orel filaments for brushes that perform no matter what the job. Nylon and polyester blend can be used with all types of paintFlat brush is an excellent choice for your indoor and outdoor painting needsBrush features a flat design for smoother brush strokes, better overall coverage and outstanding finished appearanceExclusive taper ratios that influence tool flexibilityMedium stiff