Quartet Dry Eraser, Large Surface Dry Erase and Chalkboard, Washable, 12 x 3 Inches (QRT52180132) For larger writing boards, this oversized eraser cleans large whiteboard and chalkboard surfaces fast; 12"W x 3"H Heavy use - perfect for classrooms and conference rooms Features durable, ergonomic handle; hand washable and lightweight for easy care and usage