Cox Board Eraser/ duster is the perfect cleaning solution for your whiteboard; comes in two types; Rip-Off or Magnetic.Rip-Off Board Eraser: Sizes: Small (L 93 x W 50 x H 37mm) or Large (L 135 x W 55  x H 50mm) It consists of 10 layers of high-density wool that provide easy wiping and are gentle on the board surface. After the top layer is exhausted, simply rip it off (Note: the ripped-off layer CANNOT be re-attached). The Eraser shell is ergonomically designed with lightweight material, curved edges and a grooved surface that provides better grip and comfort.Magnetic Board Eraser: Size: Small (L 93 x W 50 x H 37mm) The magnet is embedded on a cloth surface, allowing you to stick the eraser back to the board after cleaning. The Eraser shell is ergonomically designed with lightweight materials, curved edges and a grooved surface that provides better grip and comfort. Note: Product may vary slightly from images due to photoshoot lighting conditions and screen settings.