Chameleon Color Tone Pens are alcohol-based markers that give you the ability to change the color tone of your pen, to create stunning effects, smooth transitions, highlighting, shading, gradations and blending. The pen goes from a light tint to rich tones of color, eliminating tonal gaps. The pen is compatible with other alcohol-based inks, non-toxic, low odor, and ideal for all paper crafts, manga, graphic and fine art. Deluxe Pen Set includes colors RD4, OR4, YO3, YL2, YG3, GR3, BG4, BL6, BL3, BV4, VO4, PR4, OL3, BR5, BR2, BK4, CG8, NU1, PK3, and NU3. There is a blending pen, detail pen, replacement nibs, instructions and idea guide. Comes in a plastic see thru case.