Quality Park No. 8 5/8 Double-Window Security Envelopes with Reveal-N-Seal® Self-Seal Closure

Double Window - #8 5/8 - 3 5/8" Width x 8 5/8" Length - 24 lb - Self-sealing - White - 500 / Box. Double-window design to display sender and receiver addresses for QuickBooks checks and other payroll and accounts payable applications. Reveal-N-Seal, self-sealing closure - simply pull the flap up and press to seal; built-in perforations along flap show evidence of tampering attempts.