The vibrant colors produce over 100 color tones giving the ability to create stunning effects such as 3D, smooth transitions, highlighting, shading, gradations and blending. Each pen goes from light to a hint of a tint to rich tones; eliminating tonal gaps in your collection. Ideal for all paper crafts, manga, graphic and fine art. This 15x12x3 inch package contains 52 pens in assorted colors within a multi-purpose case with carry strap. Non-toxic. Conforms to ASTM D 4236. Imported.