Marks A Lot Desk-Style Dry Erase Marker, Broad Chisel Tip, Black, Dozen (24408) New formulation erases easily and cleanly. Improved color vibrancy and long-lasting writing. Marks on whiteboard, glass, and other nonporous surfaces. Durable chisel tip marks in a variety of widths. Cap can be left off for 24 hours without dry-out. Safe to use at home or school. Low odor, non-toxic.