The BCW Long Comic Bin is a heavy duty comic box made from acid-free, reinforced, snap-together panels. The Long Comic Bin holds about 300 bagged and boarded comics and includes a movable partition that helps stand up your growing stack of comic books. Identification slots on the ends help you mark your boxes with either a 3"x5" index card or a toploading card holder. The lid panels feature sliding locks for added security.