The Aqua Brush Duo is a water-based ink pen that was especially developed for artists and designers. The outstanding properties of the dual tips on these pens enable the user to produce beautiful brush effects. - Lyra Aqua Brush Duo Markers - Assorted Colors, Set of 24Lyra Aqua Brush Pen, 24/CT SET - Includes Light Yellow, Cadmium Yellow Lemon, Lemon Yellow, Cadmium Yellow Deep, Orange, Saturn Red, Pale Geranium Lake, Rose Carmine, Deep Carmine, Cobalt Blue Light, Light Blue, Cerulean, Prussian Blue, Night Green, Permanent Green, Chrome Green, Yellow Still De Grain, Deep Sepia, Van Dyck Brown, Gold Ochre, Burnt Ochre, Venetian Red, Pompeian Red, and Black.