pectra AD® Marker Cool Gray Set, 12 Colors This range of light cool gray to black markers is ideal for blending and shading to get gradients and smooth color transitions. This set of 12 markers comes in a plastic wallet with a snap closure. The hang tag is removable making the set easy to transport in a backpack, art box, or bag. Spectra AD® Markers are alcohol-based markers that are ideal for art and design projects. Spectra AD Markers are extremely versatile, featuring dual-ended tips with a flexible brush nib on one side and a unique tri-nib on the other. The AD Marker signature Tri-nib offers three line widths – fine, medium, and broad – with the twist of the wrist. The nibs are removable and replaceable, and the markers are refillable. Colors dry fast, are permanent, non-toxic, and are low odor. They can be used with the Spectra AD Blender Marker to create gradations, to blend and lighten color, and to mix with other colors to create something truly unique! Spectra AD Markers can be used with traditional xylene-based AD Markers. For best results, keep finished works out of direct sunlight. Colors Include: Cool Gray 90%, S031AD Cool Gray 80%, S030AD Cool Gray 70%, S029AD Cool Gray 60%, S028AD Cool Gray 50%, S027AD Cool Gray 40%, S026AD Cool Gray 30%, S025AD Cool Gray 20%, S024AD Cool Gray 10%, S023AD Basic Gray 6, S083AD Black, S020AD Colorless Blender, SOAD