Sort and arrange checks, invoices, receipts, and other paperwork that needs to be reviewed or signed. High volume of contents is accommodated by an expanding spine. Spine coated in tear-resistant plastic foil for added durability Window with a hinge for simple label replacement 20 reinforced turning tabs located at the bottom of each blotting page Every page has three peek holes that allow you to see what's inside. Accepts paper in A4 and US letter sizes.