This Spectra AD Marker is extremely versatile featuring a dual ended tip with a flexible brush tip on one side and the innovative Tri nib on the other. The AD Marker signature Tri nib offers three line widths fine medium and broad with just a twist of the wrist. The color is blendable when wet and dries fast and permanent for superior layering.Model NO CHS050ADBrand ChartpakChartpak Spectra AD Marker Taupe