Quartet Glass Whiteboard Eraser, Premium, Magnetic, 3-In-1, 6-1/2"x1-3/8", Silver (SFEB3) OPTIMIZED FOR GLASS BOARDS  Premium magnetic eraser is designed for use on glass dry-erase boards. Easily remove writing from the glass surface to keep your board looking clean throughout heavy use 3-IN-1 CONSTRUCTION  A reversible felt pad provides two cleaning surfaces for everyday use, while the third integrated microfiber eraser surface helps with periodic deep cleaning and residue removal MAGNETIC  The extra strong magnetic eraser can be stored right on your magnetic board. Conveniently within reach for quick and easy erasing ERGONOMIC DESIGN  Molded handle fits comfortably in hand. The unique shape is designed for hard to reach spots and corners, ensuring that every section of your board can be cleaned