This is a pack of 100 Clear File Archival-Plus printed pages. They can hold six images that are 4 x 6 inches each. They are made from a specially formulated polypropylene for the safe, long-term protection of your valuable images. ArchivalPLUS Negative Pages are Clearfile's best-selling brand. Clear File ArchivalPLUS storage pages feature incredible crystal clarity and are manufactured at a heavier thickness than flimsier alternatives resulting in greater durability and presentation. Archival Safe, PVC Free Plastic enclosures made from polyvinyl chloride (PVC) are not recommended for archival photo storage. This plastic, often called "vinyl," is not as stable as some other plastics. May contain volatile acidic plasticizers as it deteriorates. Tear Resistant Seals A stitched sealing method that allows each seal to work independently to resist tearing, as opposed to a straight line that continues to separate completely once tearing begins. Additionally, the sewn-in seal increases airflow between the pockets and therefore further protects against ferrotyping and moisture.