Copic Markers C4-Sketch， Cool 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 pemranent and non-toxic; dries acid free</li></ul></div><img src="http://ecx.images-amazon.com/images/I/21hanE4vHbL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/21y1RodcGXL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31EwGZ4YEgL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/21OXQdM61fL.jpg" noproxy>