Copic Marker Sketch with Replaceable Nib, Tuscan Orange Copic sketch marker with 3 nib options Replaceable nibs and refillable ink Alcohol-based ink is permanent and non-toxic Compatible with the copic airbrush system; easy-to-read color names and numbers Available in tuscan orange color Sketch markers available in 358 colors and have 3 nib options Refillable markers and replaceable nibs, compatible with copic air brush system Alcohol-based ink is pemranent and non-toxic, dries acid free Compatible with the copic airbrush system; easy-to-read color names and numbers Available in tuscan orange color