1. The back of the piece has a magnet and is strong. 2. The route mark is clearly marked with a pen to facilitate writing and rubbing. 3. Bright colors, clear printing, and exquisite workmanship are conducive to coaching. 4. Material: magnet + PVC board. 5. Weight: 460g. 6. Dimensions (length x width): 30x20cm. 7. Thickness: 2mm.
