・These markers have vivid colors like poster paint! ・Excellent water resistance prevents the ink from running when dry. ・Being water-based, they won't damage materials and have no unpleasant odor. ・You can write over them once they're dry. ・No bleeding or show-through. ・The opaque ink allows you to write on metal, glass, plastic, etc. ・This is a set of 12 colors in an extra-fine tip.