Chameleon Art Products, 30-Pen Set PROFESSIONAL QUALITY - Our alcohol-based pen is permanent on most surfaces, non-toxic, and low-odor. MORE FOR LESS - Using our special mixing chamber, each pen goes from as light as a hint of a tint to rich tones, eliminating tonal gaps in your collection so you can do more with less. ONE PEN TWO NIBS - Our pens feature a double-ended design, a Japanese SuperSoft brush nib and bullet nib, ideal for paper crafts, manga, graphic & fine art. LONG LASTING - Keep your pens top notch with our replaceable nibs and refillable inks. PRODUCE OVER 100 COLORS - This set of 50 vibrant color tones, one detail pen, and one color blender produce over 100 color tones giving you the ability to create stunning effects such as 3D, smooth transitions, highlighting, shading, gradations and blending, all with one pen.