GLOBAL INDUSTRIAL DRY ERASE MARKER SET PACK OF 4 OUR DRY ERASE MARKERS WORK GREAT ON WHITE BOARD GLASS AND ANY OTHER NON-POROUS SURFACE. THE INK IS EASILY REMOVED WITH A DRY CLOTH TISSUE OR ERASER. LOW ODOR NON-TOXIC DRY ERASE INKS WILL NOT IRRITATE YOUR EYES OR NOSE. AVAILABLE IN A PACKAGE OF FOUR ASSORTED COLORS - BLACK RED BLUE AND GREEN.