The Tombow ABT Dual Brush Pen has a fine tip perfect for consistent lines and tight drawings, complemented by a highly flexible brush tip which is soft yet durable. Tombow ABT's are water-based and so odourless, non-toxic and acid free. They work like watercolour paints and blend effortlessly.These pens are widely used for rubber-stamping, card-making and as artists' watercolour pens. The Dual Brush Pen is also used by comic book designers and graphic artists. The fine tip is mainly used when drawing exact lines. The second tips is thicker and flexible like a brush. Available in over 90 vivid colours, including a colourless Blender.This set is the primary box of 18.The following colours are included in this set: N15 black, 055 process yellow, 173 willow green, 296 green, 346 sea green, 535 cobalt blue, 555 ultramarine, 606 violet, 665 purple, 755 rubine red, 845 carmine, 879 brown, 899 redwood, 905 red, 925 scarlet, 947 burnt sienna, 977 saddle brown, 985 chrome yellow.