Leisure Arts Dual Ended Markers offer premium water-based ink for your creative outlets. Calligraphy Set 12pc- Premium, water based, dual ended chisel tip marker set for calligraphy, fine writing and illustration. Each pen has a fine, 2.5 millimeter, and a broad, 4.5 millimeter tip; one on each end. Includes: black, brown, red, orange, yellow, green, dark blue, light blue, light pink, pink, purple and a clear blender.