Permanent Markers | 24 Pens | 4 Classic Colors | 2-mm Line | 4.2-mm Ultra-Fine Tip24 Rainbow Colored Markers That Wont Easily Dry Out Each permanent ink marker in this set is sealed with an air tight lid, making the ink in each low odor permanent marker long lasting. Every indelible marker in our rainbow color set wont easily wash off or fade, either. Whether youre looking for ultra fine permanent marker pens or extra fine tip permanent markers, the ultra fine tips of this set are suitable for glass, metal, canvas, and fabric.