Check the listing for details. #10 Double Window Security Envelopes - Self Seal - Security Tinted (30001). Condition: New. Listed at 29.99 USD. #10 Security Envelopes - Double Window Self-Seal - Security Tinted - for everyday business and legal mailing. #10 premium double window security envelopes, designed for secure invoices and statements mailing. These envelopes feature a dual window custom design and a secure self-seal adhesive strip for maximum security during business mailing. Our premium security tint ensures your documents remain confidential. This pack includes 500 envelopes, perfect for your high-volume mailing needs 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 super strong SELF-SEAL strip and tinted security patterns.TINTED SECURITY PATTERN; perfect for mailing invoices, statements, standard business & legal documents and sensitive correspondence, our #10 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" 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.QUICK-SEAL CLOSURE; our #10 envelopes are designed with an ultra strong SELF-SEAL adhesive strip to create a full, super secure seal across each envelope's width that won't easily open or tear, ideal for mailing for any letter sized and larger documents without splittingLONG LASTING SUPPLY; perfect for everyday business use, our envelopes are provided as an ultra long lasting, 500/2500 envelope supply measuring 4-1/8 x 9-1/2, ideal for mass mailing and all business needs!