Magnetic whiteboard eraser adheres to any metal-backed whiteboard or steel surface for quick storage and access. Compact shape is sized perfectly for use by children. Durable construction cleans easily with just soap and water for long-lasting use. Soft material effectively removes dry-eraser ink without harming the surface of your board. Board Eraser Application: All Dry Erase; Eraser Pad Material: Foam; Eraser Width: 4.4"; Eraser Depth: 2".