You'll be in a great mood when you use the bright and cheerful Pure Yellow ZIG Memory System Millennium Pen. This ultra-fine marker features a 0.2mm (005) tip and a smooth-flowing water-based pigment ink. The pen is xylene-free, photo-safe, acid-free, lightfast, and odorless, making it a great choice for sketching, writing, doodling, technical drawing, and journaling.