Description Chartpak Spectra AD Markers feature dual-ended tips with a flexible brush nib on one side, and an innovative Tri-nib on the other. The Tri-nib offers three line widths – fine, medium, and broad. Markers are alcohol-based and available in 95 colors. Colors are non-toxic, dry fast, and are permanent. Can be used with blender markers to create gradations, blur, and lighten colors. Can also be used with traditional xylene-based brands.
