This magnetic whiteboard eraser features a built-in spray cleaner. Wipe your board clean first with the felt portion and then spray clean to remove any extra ghosting, shadows, streaks, stains or remnants of dry erase markings. Magnetic design ensures that you can store your eraser on any magnetic surface for convenient access. Board Eraser Application: Dry Erase; Eraser Pad Material: Felt; Eraser Width: 2.5"; Eraser Depth: 6".