Quartet High Performance Fine Tip Dry-Erase Markers, Red, Blue, Green and Black, Set of 4 Markers (5001-10U) High-performance, non-toxic dry-erase markers with quick-drying, high-performance ink ensures clear writing and is easily erasable Communicate boldly with vibrant black, red, green and blue ink Choose from thick or thin lines with versatile fine tip Thick barrel and tapered design for lasting style and comfort, even in extended meetings Roll-resistant cap prevents markers from drifting out of sight