Marker pens for every creative impulse! Duo-Tip Markers mean twice the colors for double the coloring fun: the wide fiber tips are great for coloring large areas, while the thin tips draw fine lines and accentuating details. All Faber-Castell® markers have bright, washable inks for easy clean up. These markers have long-lasting, water-based ink which allows them to be re-hydrated by simply dipping the nib in water.