#9 Double Window Security Tinted Business Mailing Envelopes – White – 24 LB – 500 Count

If you’re using QuickBooks and mailing Estimates, Invoices, and/or Statements to customers, these are the envelopes to use.  These are less than half the price of the same envelopes sold by Staples.  Click  here to compare price at Staples.



  • DOUBLE WINDOW SECURITY ENVELOPES; tired of cheap paper envelopes that can be easily seen through? These Double Window Security Envelopes are ultra-secure and perfect for mailing invoices, statements and legal documents, with secure moisture activated gummed seal and tinted security patterns.
  • TINTED SECURITY PATTERN; perfect for mailing invoices, statements, standard business, legal documents and sensitive correspondence, these #9 Envelopes are printed with a secure tinted pattern, easily obscuring numbers and data for premium, added security compared to other cheap envelopes
  • DUAL WINDOW DESIGN; easily read dual windows for everyday business mailings to easily display postal addresses. Each envelope contains two front windows, a 1-3/16″ X 3-1/2″ top window positioned 3/8″ from the left and 2″ from the bottom and the bottom 1 X 4″ window is 3/8″ from the left and 1/2″ from the bottom
  • SIDE SEAM GUMMED FLAP CONSTRUCTION; moisture activated GUMMED seal, these envelopes allow you to send out advertisements, invoices, special offers, and more, while maintaining an image of professionalism
  • LONG LASTING SUPPLY; perfect for everyday business use, our envelopes are provided as an ultra-long lasting, 500 envelope supply measuring 3-7/8 x 8-7/8, ideal for mass mailing of business documents!