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.