The perfect surface to build your Hart Puzzle. Made of flexible clear matte plastic with a non-scratch surface. Includes edge markings for your 500 (18x24) or 1000 (24x30) piece Hart Puzzle. One person can easily pick up and move a puzzle if needed. Break-up the puzzle when you’re finished and funnel all the pieces neatly back in the box. Clear neutral color. Pieces easily slide on the mat. Great surface for gluing. Comes with handy storage tube. Wipe clean. Made in USA.