Create great depth in your art using blending stumps along with PrismaColor Pencils, chalks and oil pencils. This assortment package contains 1/4", 3/8" and 1/2" sizes, so you always have the perfect size to blend your project. Blending stumps are made of soft, rolled paper with pointed ends. Use the fine tips to blend or remove colour from small areas and the broad side of the tip for larger areas. To sharpen the tips as they wear from use, simply use medium grit sandpaper.