To fight spills that could ruin your documents, these classification folders feature a moisture-resistant acrylic coating on heavy-duty, 20 point pressboard. Use the two inner, Kraft partitions to subdivide your letter-size project files. Both partitions have 1" capacity fasteners. Front and back covers also offer 2" capacity bonded fasteners to expand your filing surfaces. The matching Tyvek spine expands up to 1" with your project. The tab is 2/5-cut and located right of center.