SECURE BUSINESS COMMUNICATIONS: Our security tinted envelopes help prevent sensitive information from being seen, providing an added layer of privacy when sending confidential information, financial statements, legal papers, and more (Sold as 1 Each/Box, 500 total envelopes) GUMMED FLAP CLOSURE: Commercial flap with gummed closure provides a secure seal, helping keep contents in place for quick, easy mailing RELIABLE MAILING SOLUTION: Made from 24 lbs. white woven paper for durability, these #9 double-window envelopes are designed to withstand the rigors of the postal system, keeping your documents safe and secure RESTOCK IN BULK: Keep plenty of envelopes on hand for all of your business needs with our bulk pack of 500 business envelopes, measuring 8-7/8 x 3-7/8 inches – Perfect for sending out invoices, checks, contracts, or other important documents WE ARE STAPLES: The line between work and life is blurring. We have solutions to keep your teams productive, connected and inspired – Whether you know exactly what you need, or you're looking for tools and inspiration to hit goals, Staples is here for you! The line between work and life is blurring. We have solutions to keep your teams productive, connected and inspired – Whether you know exactly what you need, or you're looking for tools and inspiration to hit goals, Staples is here for you! Ensure secure and professional mailing with our 500-pack Staples #9 Double-Window Security-Tint Mailing Envelopes. Our envelopes are perfect for invoices, statements, and business correspondence. Designed for efficiency, these #9 business envelopes feature dual address windows, eliminating the need for manual labeling while ensuring a professional presentation. Upgrade your business mailing system with Staples security envelopes, offering privacy, durability, and convenience for seamless invoice and statement delivery.