#9 Double Window Security Business Mailing Envelopes for Invoices, Statements and Legal Documents - GUMMED Closure, Security Tinted - Size 3-7/8 x 8-7/8 - White - 24 LB - 500 Count (30129) DOUBLE WINDOW SECURITY ENVELOPES; tired of cheap paper envelopes that can be easily seen through? Our 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 wave patterns TINTED SECURITY WAVE PATTERN; perfect for mailing invoices, statements, standard business, legal documents and sensitive correspondence, our #9 Envelopes are printed with a secure tinted wave 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! Click the Orange Button to order now