RediMark+ markers feature water-based, odor-free ink in eight colors. Both fine and broad lines are possible using molded chisel tips. Permanent ink dries quickly and won't bleed through paper. These markers offer large, durable plastic barrels and unique patented thumb cap buttons for easy, one-hand cap release. Each set contains 4 Assorted Markers - Red, Green, Blue and Black. AP certified non-toxic.