500#9 FLIP & SEAL Double Window Security Envelopes - for Invoices, Statements & Documents, Self-Sealing Adhesive Seal, Security Tinted, Size 3-7/8 x 8

500#9 FLIP & SEAL Double Window Security Envelopes - for Invoices, Statements & Documents, Self-Sealing Adhesive Seal, Security Tinted, Size 3-7/8 x 8

Our Double Window Security Envelopes feature premium-quality paper construction with advanced security features, making them ideal for sensitive documents like invoices, statements, and legal correspondence. The specialized design prevents content from being visible through the envelope material. The envelopes incorporate sophisticated tinted wave pattern security printing that effectively obscures internal contents, providing superior protection for sensitive information compared to standard envelopes. This feature ensures your confidential documents remain private during transit. The dual window configuration offers optimal functionality with precisely positioned openings: an upper window (1" x 3/16") located 3/8" from the left and 2-1/16" from the bottom, and a lower window (1" x 4") positioned 3/8" from the left and 1/2" from the bottom. This design accommodates standard business addressing formats. These envelopes feature a high-quality flip-and-seal adhesive system that creates a strong, reliable seal. Unlike traditional gummed seals that can fail, this secure closure mechanism maintains document security while enabling efficient processing of bulk mailings. Each package contains 500 business-sized envelopes measuring 3-7/8" x 8-7/8", providing an ample supply for extensive business mailing needs. This bulk quantity ensures you have sufficient inventory for ongoing professional correspondence. 500#9 FLIP & SEAL Double Window Security Envelopes - for Invoices, Statements & Documents, Self-Sealing Adhesive Seal, Security Tinted, Size 3-7/8 x 8-7/8 - 24 LB - 500 Count (30109)