JOJOO 72-color Marco Colored Pencils for Artist Sketch Drawing - Oil Base Assorted Colored Pencil Set for Adult Coloring Books/ Secret Garden Coloring Book (72 Colors), 266 Made of environmental material which is harmless to your health. Used for writing, drawing and sketching on paper. The print effect is clear, uniform in color, not easy to fade. Colorful, extra-smooth lines in rough drafts, sketches and pencil illustrations are provided. The drawing pencil outline fits comfortably into your hand for a smooth writing experience.