Quality Park #9 Security Tint Window Envelopes (model QUA21212) are commercial business envelopes designed for high-volume mailing operations. Each envelope measures 3.88 x 8.88 inches and features a single right-side address window with a glassine window pane that clearly reveals recipient address information printed on the enclosed document, eliminating the need for separate address labels.

The envelopes are made from 24 lb wove-finish white paper and feature a commercial flap with a built-in gummed closure that simply requires moistening before sealing. The security tint interior lining helps protect the contents from being read through the envelope. The right-window design is compatible with standard business forms including invoices, financial statements, remittance documents, and direct mail pieces. This box contains 500 envelopes.