#10 FLIP & SEAL Double Window Security Business Mailing Envelopes for Invoices, Statements & Legal Documents, Self-Sealing Adhesive Seal, Security Tinted, Size 4-1/8 x 9-1/2-24 LB 500 Count (30110) 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, standard business & legal documents, with secure flip and seal adhesive and tinted security wave patterns TINTED SECURITY WAVE PATTERN; perfect for mailing invoices, statements, standard business & legal documents and sensitive correspondence, our #10 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" X 3-1/2" top window positioned 1/2" from the left and 2-1/2" from the bottom and the bottom 1-1/8 X 4" window is 1/2" from the left and 3/4" from the bottom FLIP AND SEAL; forget cheap, weak, gummed envelope seals that easily tear, our Double Window Security Envelopes are designed with quick, ultra secure flip and seal adhesives, creating a secure seal that wont accidentally open, perfect for time saving bulk mailings LONG LASTING SUPPLY; perfect for everyday business use, our envelopes are provided as an ultra long lasting, 500 envelope supply measuring 4-1/8 x 9-1/2, ideal for mass mailing and all business needs! Click the Orange Button to order now