Package includes - 48 x square whiteboard erasers(12 pieces for each color). material: Glue the foam and felt in with a strong adhesive,don't worry about them off,ensures it can last for a long time use Sizes and colors - 2 x 2 inch/ 5 x 5 cm, 4 colors include:red,yellow,blue,cyan, suitable for both children and adults to use Use soft magnetic felt, Each whiteboard eraser weighs only 7g, they stick to metal chalkboard and surfaces easily, help to save space, a handy necessary for classrooms, office, home Compatible with white/ black boards, dry erase sheets,melamine, porcelain and glass surfaces,recommended to use whiteboard markers,to clean the whiteboard effectively, you need to press the erasers a little bit harder Service life - Each whiteboard eraser can be cleaned at least 1000 times Material:EVA colour:Multicolor Package Contents: 48 x square whiteboard erasers 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.