The C-Line Poly Sheet Protectors, 200/Box, have a special design that allows easier insertion of pages while keeping contents secure. Their acid-free archival-quality prevents print or images from transferring onto the protector. It also keeps the sheets from becoming yellow or brittle over time. There's no punching necessary, keeping documents in original condition. These top-load sheet protectors have reinforced binding edges for extra durability. They make an ideal addition to your office supplies. These economy gauge C-Line sheet protectors hold documents that measure up to 8.5" x 11" and are pre-punched to fit a standard three-ring binder. The crystal clear design makes it easy to read the page without having to take them out of the sleeves. They come in a recloseable box that's easy to open for storage until you need each unit.