Easily erasable with a dry cloth or eraser, these whiteboard markers are compatible with whiteboards and other nonporous surfaces.- Produces a line width almost 50% smaller than most fine markers- Perfect for writing in small/tight spaces such as calendar/small personal dry erase boards- Expo® dry-erase markers feature quick-drying ink to resist smearing- For optimal results, use on nonporous surfaces such as porcelain or melamine whiteboards and glass- AP certified non-toxic for all recommended uses