These multipurpose markers produce neat and precise lines for outlines and can also fill in spaces. The water-based ink is nontoxic, waterproof and lightfast and can be used on a variety of surfaces including canvas, glass, metal, leather and more.Details:Includes assorted neon colors1.8-2.5mm medium tips4 markersWater-based permanent inkNontoxic, waterproof, lightfastMulti-surfaceWon't bleed through paperQuick-drying