Material and Size: Made of premium quality foam material and high density felt bottom, non-toxic, only the back side with high density felt bottom is magnetic.size: 2 x 2 x 0.75 inches,Adorable and functional! Wide Applications: Suitable for home, office, school, dormitory, game room, play centers etc. Great help to managers, teachers, students and kids. Perfect for presentation, drawing, education and score counting. Quick and Easy: Clean the whiteboard easily and effectively, just swipe the eraser with a little pressure to clean your whiteboard. Magnetic Whiteboard Erasers: These magnetic erasers are easy to be used and cleaned up, they are not just erasers, also can be used as magnets on whiteboard or any other magnetic surface, a handy necessary for classroom, school, home, office meeting. What You Get: 40 x square whiteboard erasers; lightweight and durable, can serve you a long time.