Columbian #9 Double-Window Security Envelopes, SimplySafe Tamper Evident, Pull Strip, Peel and Seal, for Invoices and Statements, 3-7/8 x 8-7/8 Inches, 500 per Box (COLO166), White

Are you tired of using unreliable envelopes that can't keep your sensitive documents safe? Look no further than Columbian #9 Double Window Envelopes with SimplySafe security seal! These top-quality envelopes are designed to protect your important papers from prying eyes and tampering, while still being easy for you to close and the recipient to open.

The patented SimplySafe seal ensures that any attempts at tampering will be clearly visible, giving you peace of mind when mailing sensitive documents.

Plus, the double window design provides clear visibility of both the sender and recipient addresses, making it easy to keep track of your mail.

Don't settle for anything less - choose Columbian #9 Double Window Envelopes with SimplySafe security seal for all your mailing needs!