Basic Strength–For light-duty stacking and storing Pull out binder for reference, slide into case for storage. Fiberboard with metal arch rings (2 3/4″ c. to c.). Adjustable compressor. Sleeve and drawer lid closure. Inside dimensions listed (w x h x d). Binder Type: Ring; Binder Style: Non-View; Binder Size Capacity: 2.5″; Binder Sheet Capacity: 425.