Van Gogh Watercolors are considered a student grade line, but their color intensity, durability and tinting strength are all very good. They're appropriate for price-conscious artists at all levels. The Van Gogh line is made from top-quality raw materials by the Dutch manufacturer Talens. The 12-tube Paint Box contains twelve 10 ml tubes, #6 Van Gogh synthetic brush and a small sponge, all in a sleek 5" x 9" palette box with six mixing areas. This contains twelve 10 ml tubes, #6 Van Gogh synthetic brush and a small sponge, all in a sleek 5"x9" palette box with six mixing areas.