and long-lasting:high density felt bottom, only the back side with high density felt bottom is magnetic, strong adsorbability. Eco-friendly, non-, no smell To clean the whiteboard easily and effectively, just swipe the eraser with a little pressure to clean your whiteboard. Perfect whiteboard erasers for kids, classroom, school, teachers, office, home, a great help to managers, teachers, students, and kids. Perfect for presentation, drawing, education and score counting Stick to any magnetic or and metal , A good assistant with strong absorb-ability, they are not just erasers, but also can be used as magnets on a whiteboard or any other magnetic , a handy necessary for the classroom, school, home, office meeting LIGHT WEIGHT AND LONG-LASTING These magnetic erasers are easy to be used and cleaned up, washable material ensures it can last for long time use, wash it with soap and water and then keep it air dry colour:blue Material:EVA + felt cloth size:5*5*2cm Package Contents: 48*Dry Erase Erasers Sweet Note: It may exist some extra felt on the when you receive, please blow them with blower or fan. The erasers are hand-washable, but not allow to wash by machine Not allow to wash by machine Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.