Specifications: Sizes: 7 CM * 4CM Thickness: 2 CM Material: EVA material magnet and felt fabric Quantity: 84/72/60/48/36/24/12/8/4/1 Pieces Package includes : 84/72/60/48/36/24/12/8/4/1 x Magnetic Whiteboard Eraser Features: Made of foam and felt lightweight and durable can serve you a long time Lightweight and soft erasers can be applied in classrooms as daily necessary. Erasers with soft magnetic can stick to metal surfaces like metal whiteboard chalkboard and so on. To clean the whiteboard easily and effectively you could press the erasers a little bit harder. Contains soft magnetic it can stick to metal chalkboard and surfaces easily help to save space and can be cleaned repeatedly wash with soap and water air dry Compatible with white/ black boards dry erase sheets melamine porcelain and glass surfaces to clean the whiteboard effectively you need to press the erasers a little bit harder.