Marabu Graphix Sketch Markers intensify the depth of color in drawings by allowing for the application of multiple layers, ideal for shading and creating color gradients. They contain high-quality, low-odor, fast-drying ink that is alcohol-based and free of toluene and xylene. Each marker features two Japanese tips, a 1-7 mm chisel tip and a fine 1 mm brush tip. Ideal for illustrations, sketches, final artwork and much more, they provide optimum results on marker paper.