Even with the vibrant ink, messages are easy to read and easy to wipe away from any dry erase surface. For the best marker care, store your marker on the side with the cap on to prevent the ink from drying out. Taking care of your markers will help them last for up to 2-3 years. This kit includes 4 markers, 1 each in black, red, blue, and green. When sharing, changing, and perfecting ideas, you need the reliability of TRU RED™ Dry Erase Markers, the ultimate collaboration tool.