Keep your mail secure and confidential with these #9 double window privacy tint envelopes. With an elegant design and a convenient self-adhesive closure, these envelopes are perfect for all your business and personal mailing needs. The privacy tint ensures that your sensitive information stays hidden from prying eyes, while the double window allows for easy identification of both the sender and recipient addresses. These envelopes are made of high-quality materials and come in a box of 500, making it easy to stock up for all your mailing needs. Whether you're sending important documents or just sending a letter to a friend, these envelopes are a great choice for anyone looking for a secure and reliable way to send their mail.