Super Premium - Pack of 24 20cm Erasers Clean any large or small board without sprays or detergents. Environmentally friendly foam, non-toxic, no smell. EFFECTIVE CLEANING - Compatible with white and black chalkboards, chalkboards, dry wipe sheets, porcelain and glass surfaces, suitable for teachers, students, workers, children used in classroom, office, home or school. Material & Size: these dry erasers are made of high density foam and black felt. The perfect size for children and adults. MAGNETIC FEATURES: With an internal magnet, you can easily stick to the white board, keep it in place and do not take up much space on the board. No more looking for a missing eraser. WASHABLE - These whiteboard erasers are washable. You can wash it with soap and water. Let it air dry to achieve more effective extinguishing. Pack of 24 magnetic white board erasers with square shape. Functions: 1. USER FRIENDLY Contains soft magnet, can easily stick to the metal board and surfaces, helps save the space, a handy one necessary for classroom, home, office. 2. MAGNETIC There is a magnet in these mini dry erasers that make them stick easily to the dry erase board or other small magnetic boards. 3. COMPACT SIZE These small dry erasers with compact size are perfect for kids and student hands as well as adults. 4. WASHABLE These whiteboard erasers are washable. You can wash them with soap and water. Let them air dry to accelerate extinguishing. 5. USEFUL Thanks to the strong magnet, it is convenient to attach to magnetic whiteboards, lightweight and durable. Great use in school, office, home for teachers, students, children. Technical data: Size: 5 x 5 cm / 1.97 x 1.97 inches. Thickness: 0.79 inches / 2 cm. Material: foam and felt. Colour: blue, red, yellow, green. Quantity: 24 pieces. Package includes: 24 x magnetic whiteboard sponge.