Prismacolor Premier Illustration Markers come in multiple tip sizes so they handle any type of illustration. Choose a fine tip for crisp line and detail work, a brush tip for the control and flexibility of a brush, or a chisel for smooth lettering, outlining and coverage of large areas. Ink is archival quality and acid free with permanent, premium pigments. They are smear resistant when dry, lightfast, nontoxic and water resistant with no bleed through. Five point sizes plus brush and chisel tips.