This Magnetic Whiteboard Eraser performs on all dry-erase surfaces & erases any dry-erase marker ink. Great for use on all melamine, painted steel, porcelain, glass & other dry-erase surfaces. The modern contoured design fits comfortably in the palm of your hand for extremely precise erasing as well as quick wiping away of all dry-erase ink on large writing surfaces. Magnetic feature enables the eraser to adhere onto any magnetic dry-erase surface. Felt bottom surface of the eraser glides smoothly on any dry-erase board surface, without damaging the writing surface. Ideal for use in the office, classroom, meeting room, boardroom & more. Board Eraser Application: All Dry Erase; Eraser Pad Material: Felt; Eraser Width: 6.99"; Eraser Depth: 3.78".