Cardinal Expanding Zipper Binder Pocket, Clear, Pack Of 3 – Pocket expands 1/2″ to hold up to 100 sheets of letter-sized paper, notes or other accessories

• Add loose pages to your 3-ring binder, and zip them in to make sure they won’t slip out!
• Archival-safe for all documents and photos — will not lift or transfer inks or toners. Also ideal for smaller items and accessories — such as business cards, brochures and writing instruments — that might fall out of an ordinary binder pocket.
• Made of durable polypropylene. Durable polypropylene is water- and tear-resistant.
• 3-hole punched to fit into any standard binder.
• Expands 1/2″ to hold more.