Set of 4 Staedtler Assorted Blends Roll of slightly porous paper pointed at both ends, used to blend charcoal, sanguine, pastel. Allows you to soften and extend strokes and create gradients. They can also be used as drawing instruments. Ideal for small details. To get a longer tip, give it a sharp blow on one side. The paper will move to the other side, making the other end longer. It is recommended to lightly rub the tip before use with sandpaper for greater smoothness and cleanliness if desired. To clean the remains of charcoal, pencil, etc., sand again to avoid dirtying the drawing. Material: compressed rice paper. Contains 4 blurs of different diameters. Includes numbers 1, 4, 6 and 8. Brand: Staedtler.