1. Material: The blending stumps and tortillions are made of rolled compressed gray paper, and wrapped tightly, pretty dense, hybrid sponge pens made of sponge, felt and ABS, can spread the medium very easily, good for creating depth and shadow 2.Package Includes: You will get 2 hybrid dual tip washable sketch eraser sponge brushes, 6 hybrid sticks and nibs (16) and 1 sandpaper sharpening block. Can meet most of your art needs, help you with your vivid masterpiece 3.Easy to Use: Our sandpaper pencil pointer can make your pencils, charcoal or your stumps and tortillions sharpen, which is easy to use. By rubbing the blender pencil on the sanding sticks, with even grit, sharpen your tortillions nicely, keep them pointed and clean 4.Nice Blending Effect: The rub sponge is used for creating a variety of texture effects in a drawing,especially useful for creating atmospheric effects, such as clouds or mist. Made of soft foam and can be used to apply or remove graphite or charcoal to create a desired texture