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.Details:Available in multiple colorsDual-ended tip (brush tip and tri-nib)Color-coded barrel and cap Xylene-basedPermanentNontoxicConforms to ASTM D-4236