Sharpie Twin Tip Markers - Fine, Ultra Fine Marker PointAlcohol Based Ink - 24 / Bag Fine, Ultra Fine Marker Point - Black Ink - Alcohol Based - 4/Pack - 6 / Bag Twin-tip marker offers dual degrees of precision with both fine and ultra-fine tips in the same marker. Mark on most hard-to-mark surfaces. Fade-resistant and water-resistant ink marks on most hard surfaces. Convenient, versatile marker delivers a quick-drying, nontoxic, alcohol-based formula.