The Wooster Ultra/Pro® Firm 4181 Thin Angle Paint Brush combines all-around versatility, precise control and everyday durability. Its firm blend of nylon and polyester filaments is suitable for all paints and both interior and exterior applications. Additional information: * Thin-angle style * Firm nylon and polyester filament blend * Square, rust-resistant stainless-steel ferrule * Rattail handle * Suitable for all paints * For interior and exterior applications * Case quantity: 6