Protect important documents, photographs, artwork, brochures, magazines, baseball cards, stamps, calanders, record albums, comic books, post cards, disks and more with these rigid and durable paperboard mailers. Rigid no-bend, Heavy - Paperboard mail efficiently, High Quality among the strongest available! UPS, FedEx & USPS APPROVED, A pressure-sensitive self-seal adhesive flap is quick and easy to close and tamper-evident. Perforated tab and tear system that saves you time in retrieving your item. State-of-the-art manufacturing equipment and "Total Quality Management" standards to ensure the highest quality products.