The 12-in-1 Multi-Surface Eraser features 12 separate felt layers. When the top surface is too soiled to erase, simply peel off for a fresh, new felt erasing surface. These erasers feature a sturdy plastic holder for an easy grip. Great for teacher use in the classroom to clean a chalk or dry erase surface. Measures 5.75"L x 2.25"W x 1.75"H. Sold as a pack of 12.