Quality Park #8 5/8 Double Window Security Envelopes (QUA67539) feature a Reveal-n-Seal self-adhesive closure for moisture-free sealing — no licking required and no removable strip to discard. The box contains 500 white wove envelopes measuring 3-5/8" x 8-5/8", made from 24 lb paper.

The double-window design keeps both sender and recipient addresses visible through pre-positioned windows, eliminating the need for manual addressing when paired with standard check or statement formats. These envelopes are widely used for checks, payroll, accounts payable, invoices, and business statements.

Security features include an inside security tint and perforation pattern that make any tampering attempts immediately visible, protecting sensitive financial documents in transit.