The long-lasting School Smart Premium Felt Chalkboard Eraser, measuring 6 x 2 x 1-5/16 inches, takes the stress out of cleaning chalk off of boards. The felt eraser features six strips of quality black and white erasing felt that are dual-sewn with strong nylon thread to a rigid inner felt back. This construction lends itself to quick and efficient eraser power. The felt back is laminated and double lock-stitched creating a full 7/16-inch thick, unbreakable base, built to last. Level up your classroom supplies this season with a premium felt eraser from School Smart!