* 20 Pack of Current Comic Book Backing Boards are essential for protecting your collection by preventing bends, creases, and damage that can reduce a comic's grade and value. * Invested Alliance Comic Backing Boards are certified acid-free, preventing the yellowing and deterioration that acidic materials cause over time. * There's a 3% calcium carbonate coating on one side, creating an additional barrier against dust, dirt, while enhancing durability. * Precision-cut to 6.75 x 10.5 inches, these current comic book cardboard inserts fit perfectly, minimizing movement and reducing edge wear. * Compatible with various current comic book storage sleeves & bags. These comic boards create a comprehensive protective solution for collectible comic book package supplies. * Invested Alliance's boards are made from 24-point solid bleached sulfate, providing robust support without adding bulk.