These sketch markers by Artist's Loft will let you color and draw like a pro. They are ideal for artists, hobbyists, and students, and the high-quality felt tips offer great accuracy of strokes. Details: Includes assorted colors 24 markers Alcohol-based ink Felt tips Conforms to ASTM D 4236 Download Artist's Loft Chromatic color chart here. Download Artist's Loft Chromatic fill-in color chart here.