Quality Park No. 9 Double Window Security Tint Envelopes with Redi-Seal® Self-Seal

Double Window - #9 - 3 7/8" Width x 8 7/8" Length - 24 lb - Self-sealing - White - Wove - 500 / Box. Double-window design positioned to the left to display sender and receiver addresses for invoices and billing statements. Uniquely designed, self-sealing, Redi-Seal closure with double flaps that press together for an instant seal without requiring moisture.