BUSINESS MAILING ENVELOPES: Suitable for many mailing projects, our envelopes are perfect for both home and business use that combine durability, versatility, and ease of use to create one product for all of your standard mailing needs (Sold as 1 Each/Box, 1,000 total envelopes) LASER CHECK & GUMMED CLOSURE: Double left-sided windows work seamlessly with laser check made by the most common software mailing systems and simply provide a secure closure to keep your contents in place by moistening the gummed flap for a quick seal – No need to worry about taping for extra security RELIABLE MAILING SOLUTION: Made from 24 lbs. white woven paper for durability, these business mailing 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 1,000 business envelopes, measuring 8-7/8 x 3-5/8 inches – Flap is on the long side for easier filling 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! Mail business documents securely and professionally with our Staples Double-Window Mailing Envelopes. Designed to align perfectly with most laser-generated forms and common accounting software, these envelopes are ideal for mailing invoices, checks, statements, and other confidential correspondence. The dual left-side windows ensure accurate address visibility without the need for manual labeling. Crafted from durable 24 lb. white wove paper, these business envelopes offer enhanced tear resistance and lasting protection throughout the mailing process. Whether you're running a small business or managing high-volume mailings, these security envelopes are a reliable choice for everyday office use.