Graduate Aquarell colored pencil sets contain pre-sharpened colored pencils with a 3.3mm diameter lead core that is durable and break-resistant. The hexagonal shape makes these colored pencils comfortable to use for hours at a time. Each pencil has a colored stripe down the side and color-coded ends. Each set comes in a durable metal tin for easy travel and organized storage and includes a brush with synthetic bristles, ideal for spreading the color with water.