For watercolor painting on watercolor paper, Marabu Graphix Aqua Pens provide high-quality, lightfast, waterbased pigment ink in a range of colors. Use the contour tip and flexible brush tip to apply color, then use a wet brush to spread it. Low-odor formula. Note: Never dip into water. - Marabu Graphix Aqua Pen - Octopy, Set of 24Marabu Aqua Pen Graphix, OCTOPY 24 SET - Includes one each of Amber, Aqua Green, Antique Green, Azure Blue, Black, Cherry Red, Dark Brown, Dark Green, Grey, Lemon, Light Blue, Light Grey, Light Vermilion, Lime, Make-up, Petrol, Pink Candy, Plum, Red Orange, Rose Pink, Smoky Blue, Smoky Quartz, Tangerine, and Ultramarine.