1. Thickened wooden board, clean edges, straight and unbending, the sound of beating board is clear and loud 2. Clear font printing, no color loss after repeated wiping 3. Hinge open and close smoothly without jamming, fine workmanship, repeated opening and closing of the corners without abrasion 4. You can diy your own copy, and wipe it with a wet paper towel to remove it after writing 5. Material: solid wood 6. Size: small size about 20 x 20cm, large size about 30 x 27cm 7. Weight: small about 200g, large about 450g
