Create precise drawings or vibrant watercolor paintings with Faber-Castell Goldfaber Aqua Dual Markers and Sets. Fully water-soluble, the dye-based ink is water-based, acid-free, pH neutral, odorless, and will not bleed through paper. The dual nib design allows you to alternate between artistic strokes with the flexible brush nib or create outlines with the metal-cased, 0.4 mm fineliner nib. They are perfect for watercolor techniques, coloring, sketching, and lettering. - Faber-Castell Goldfaber Aqua Dual Markers - Assorted, Set of 18Goldfaber Aqua Dual Marker, ASST 18PK - Includes the colors 107 Cadmium Yellow, 109 Dark Chrome Yellow, 122 Brilliant Red, 121 Pale Geranium Lake, 128 Light Purple Pink, 284 Purple, 137 Blue Violet, 449 Azure Blue, 356 Light Cobalt Green, 171 Light Green, 283 Burnt Siena, 115 Dark Cadmium Orange, 228 Magenta Bright, 272 Warm Grey III, 183 Light Yellow Ochre, 163 Emerald Green, 110 Phthalo Blue, and 199 Black.