This flat brush from Princeton Artist Brush Company is for filling in large areas, blending, and its edge can be used for fine lines. It has a synthetic filament that will make the paint glide smoothly onto the desired surface. Details: Flat Available in multiple sizes Synthetic filamentLong handle Non-glare brass ferruleWooden handleLevel 2Ideal for outdoor painting For use with all acrylic and oil paints, including water-soluble oils