EXPO® Low Odor Dry Erase Markers use a specially formulated, alcohol-based ink with virtually no odor. The markers feature vivid ink that is quick-drying and easy to see from a distance. These dry erase markers write on whiteboards, glass and most non-porous surfaces.• Bold colors are easy to see from a distance and easy to erase from whiteboards, glass and most non-porous surfaces • Low odor dry erase ink is ideal for classrooms, offices and homes • Each pack includes 4 chisel-tip markers in 4 colors • Sold as 3 packs for a total of 12 markers