Dry erase XY axis graph magnet from OptiMA Inc. A perfectly sized 30" x 45.25" or square 45.25" x 45.25" roll up XY axis dry erase print on a super strong magnet that you can stick onto your existing magnetic whiteboard or chalkboard when the lesson plan or presentation calls for it. Then when you're done simply roll your XY axis print back up with the print facing out and store it away in the heavy duty cardboard storage tube that it came in. Every XY magnetic print is covered in our exclusive clear dry-erase writing surface so the XY Axis print is fully and completely protected and will never wear off. You can write on the surface with multi-colored wet or dry erase markers. We include one of our Opti-Wipe™ micro-fiber cleaning and polishing cloths and a black chisel tip marker with every unit. Made in the U.S.A. School Purchase Orders accepted.