About this product

Protect your mail with this 500-pack of Staples standard invoice double-window security-tint gummed #9 envelopes.

Mail invoices safely with these Staples standard invoice double-window gummed envelopes. Each envelope is made with 24-pound white paper, offering protection against wear and tear and weather, while the gummed top closure on the commercial flap ensures envelope contents stay secure. These Staples standard invoice double-window gummed envelopes come in a pack of 500 for bulk mailing and are tinted, protecting any confidential customer information.

  • US #9 business envelopes are suitable for many mailing projects
  • Made from white 24 lb. paper for durability
  • These envelopes measure 3 7/8"H x 8 7/8"L in size, providing enough space for your mail
  • Gummed closure with commercial flap keeps contents in place
  • Security-tinted pattern helps to discourage reading sensitive information through the outside of the envelope
  • 500 envelopes per box
  • Tear-resistant envelope provides extra security for item being shipped
  • Double-window envelopes conveniently display addresses
  • The flap is on the long side for easier filling
  • First window dimensions: 3.5" x 1.19"
  • Second window dimensions: 4" x 1.19"
Protect your customer's confidentiality using these Staples envelopes. These security-tinted envelopes offer features such as gummed flaps and durable, woven paper to conceal internal documents from prying eyes. Use these double-window envelopes to mail business invoices, displaying the sender and receiver addresses without revealing other document details.

Enhanced Privacy Features
Protect sensitive client information with these security-tinted envelopes. The soft-blue pattern lining the envelope's interior makes it impossible to see the details of the contents, even when held up to the light. Mail invoices and other important documents with confidence.

Tamper-Resistant Design
Seal these Staples envelopes with the gummed flap closure. Once sealed, the flap easily shows evidence of tampering. The durable, woven paper extends the tampering resistance of this envelope, standing up to normal postal wear and tear without damage.

Convenient Double Window
Display the sender and receiver addresses through the double window openings. Positioned to fit most invoice address layouts, these openings are a convenient way to make sure the invoice is delivered straight into the customer's hands. If the envelope can't be delivered, the window for the return address makes sure it gets back to you.