Pentel Arts Oil pastels in a set of 25 colors that go on smooth and blend easily. More vivid than chalk pastels and more resistant to humidity and light. Use on paper, board or canvas. Includes all colors in the 12 set, plus: Chrome Yellow, Yellow Ochre, Prussian Blue, Yellow Orange, Ultramarine, Deep Green, Pale Brown, Green Gray, VanDyke Brown, Old Rose, Vermillion, Pink, and Purple. ACMI Certified. For artists of all ages.