Set 3 Duotip Black and Gray Ecoline Markers Double-ended markers in gray tones, one fine round and the other wider beveled. You will have the freedom to create strokes of all kinds and fill larger surfaces. They contain concentrated and transparent watercolor paint. Suitable for use on watercolor, drawing or cardboard paper. To work with them, you can mix the colors with water and a brush to obtain watercolor effects and smooth transitions, or apply them directly to damp paper. Store them horizontally so the colorant stays evenly distributed throughout the marker. If the tips have dried out, just moisten them with a little water to make them work again. Colors: 738 Light Grey, 717 Cool Grey, and 700 Black. Brand: Talens Ecoline