This is necessary. Card book baffle is used to protect small cards, usually placed on the first page of the card book. It is difficult to prevent the small card on the first page from bending. If the baffle is not placed for a long time, the small cards on the first page will bend. If there is no baffle, the cards inside will be easily misplaced, which is not conducive to long-term storage. The card-inserting baffle can better protect the card from being dirty or damaged, so it is necessary to buy the card-inserting baffle.