Extra Wide Black, Blue, Red and Green 1 1/4 Inch Whiteboard Marker Kit With 2 inch White Board Cleaner Compatible with all whiteboards or whiteboard surfaces. A no odor safe water based solution. Certified AP Nontoxic Works with Dry Erase markers on white board makes wide bold heavy opaque Lines A wide 30mm tip on one side with a rounded 9mm side makes 1/8 to 1 1/4 inch marks on a whiteboard Will erase with with water and a damp sponge (included) or a damp cloth Cleans completely from white board with no ghosting or stains when dry. Zig Whiteboard cleaner included with a 50 mm applicator