The Premium Felt Eraser can be used to clean both chalk and dry erase surfaces. Great for teacher and student use in the classroom or at home to clean a chalk or dry erase surface. Made with six black and white felt strips that are double-stitched to the eraser backing for added durability. The eraser backing is also reinforced for longer eraser life. Each eraser is 5" x 2" x 1-5/16". Pack of 12 erasers.