This brush delivers the ultimate in flexibility， performance and durability to provide professional results and make it easier to complete your project. This professional quality flat paint brush is handcrafted with a precision blend of nylon and polyester filament and a quality metal ferrule for use with all paints and stains. Flat paint brushes are ideal for painting large flat surfaces and can be used with both acrylic and water based paints and stains or oil-based paints and stains.