A super-sized version of the classic Pitt Artist Pen. Uses India Ink that is acid free, waterproof when dry, and odorless. Available in 48 vibrant colors, Pitt Artist Pens won’t bleed through paper like traditional markers. The nib is long lasting and sturdy, ideal for drawing, sketching, and more detailed work. They are perfect for all types of surfaces including canvas, fabric, wood, and ceramic.