Sigel Magnetic Eraser for Glass Board Markers, 13 x 6 x 2.6cm, BlackBoard eraser, black red, magnetic, for magnetic glass boards and whiteboards, fast, dry erasing of chalk and ink, ethylene vinyl acetate (EVA), polyester, polyamide (PA), neodymium, 13 x 6 x 2,60 cm. SIGEL's high quality board accessories really come into their own when you want to visualise ideas on whiteboards or magnetic glass boards, pin cards showing your workflow onto a pinboard, or enable the whole team to see how the project is progressing.