Grumbacher Academy watercolors provide exceptional watercolors at a very sensible price. The finely ground, rich pigments are thoroughly mixed in a premium gum arabic binder to provide an even dispersion of color. A wonderful choice for beginning student watercolorists. Available in 60 colors to accommodate even the most discriminating watercolor palette. 0.25 oz. tube. Magnesium green. AP Seal, non-toxic.