This handy eraser is magnetic so it mounts easily to your dry erase board surface, making it easy to keep your whiteboard clean and refreshed and ready for your ideas. It also holds three (3) Expo dry erase markers (included) to keep multiple colors at your fingertips. The eraser's unique nylon erasing material scrubs away the most stubborn stains and traps dry-erase ink dust. Expo dry erase markers have quick-drying smear-proof ink that provides consistent color quality and a chisel tip for drawing fine or wide lines. Expo low-odor markers are certified AP nontoxic. Ink conforms to ASTM D-4263..