Copic Markers N1-Sketch， Neutral Gray<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Sketch markers-available in 358 colors and have 3 nib options</li><li>Refillable markers and replaceable nibs; compatible with copic air brush system</li><li>Alcohol-based ink is permanent and non-toxic; dries acid free</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41Dv4ilOjcL.jpg" noproxy>