Premium dry-erase marker utilizes a special low-odor ink formula, making it ideal for classrooms, offices and homes. Consistent, skip-free marking, bold color options and great erasability make Expo one of the most popular brands on the market. Quick-drying ink minimizes the potential for smearing. For optimal results, use on nonporous surfaces such as porcelain or melamine whiteboards and glass. Colors: black, blue, green, red.