OEM Quality Park Redi-Strip First Class Catalog Envelopes, available in a box of 100. These first-class catalog envelopes feature a postal-approved, green diamond border and a convenient Redi-Strip closure for easy sealing. The removable strip allows for a clean, quick seal upon contact, ensuring your documents are securely enclosed. Made from sturdy 28 lb. paper, these open-end style envelopes are designed for reliable mailing.