Hanging data binder features Presstex covers and storage hooks to secure up to 6 of unburst sheets. Design is top-loading and bottom-loading. Acrylic coating on binder provides a water-resistant cover. Retractable filing hooks are designed for both single-point filing and a drop file system. These flexible nylon posts adjust to hold up to 6 of sheets attached in continuous form. Data binder accommodates the following center posts: 8 and 7 .Acco PRESSTEX Unburst Sheet Covers Light Blue 1 / Each (Quantity)