Schmincke Horadam Aquarell 5ml Paint Tube Metal Set, Set of 18 Colors (74118097) Superior quality, natural ingredients are carefully selected each year for every formula for highest optimization Traditional formulas since 1881 are the same in pans and tubes Formulas used by classic artists like Emil Nolde and Oskar Kokoschka An optimal amount of Oxgall enables the artist to decide (and not the paint!) as to where the paint should flow moist or stay dry on the paper 18 colors included in set