The BCW Silver Comic Backing Boards 100ct Pack is a set of action figure accessories designed for collectors. Made of silver polypropylene, these resealable boards are ideal for storing and protecting comics. The pack includes 100 boards, making it suitable for a large collection. With features like being acid-free and suitable for all ages, these boards provide a safe and organized way to display and preserve comics. Perfect for fans of the Free! franchise or anyone looking to add a touch of silver to their collection.