Heavy duty, acid-free plastic Includes one black Magazine Bin Partition. Interior Dimensions (WxHxL): 9 1/8 x 11 7/8 x 15 1/2. Exterior Dimensions (WxHxL): 10 1/4 x 13 1/8 x 16 1/2. The BCW Magazine Bin is a heavy duty storage box made from acid-free, reinforced, snap-together panels. The Magazine Bin holds bagged and boarded magazines, document toploaders, magazine toploaders (both 5mm and 7mm thicknesses). Golden age comic books (in bags and boards and toploaders) fit in the Magazine Bin.  Also includes a movable partition that helps stand up your growing stack of papers. Identification slots on the ends help you mark your boxes with either an index card or a toploading card holder. The lid panels feature sliding locks for added security. Additional Magazine Document Bin Partitions are available separately. Smaller magazines (like National Geographic, etc) are a better fit in the Comic Book Bin.