Staples Duramark chisel-tip black permanent tank markers use quick-drying ink for smudge-free writing. Label boxes, envelopes and kraft paper with these Staples Duramark tank markers. Chisel tips let you write in fine or broad strokes, and the large, round barrels offer a comfortable grip. The permanent ink resists fading to keep your writing looking crisp and clear over time. With 12 pieces in each pack, these Staples Duramark tank markers make it easy to stock your desk drawer or supply closet. • Permanent ink formula is designed to last.