Quality Park #9 Double Window Redi-Seal Security-Tinted Business Envelopes come in a 500-count box, making them ideal for high-volume office mailing needs. Each envelope measures 3 7/8" x 8 7/8" and is constructed from durable 24 lb white wove paper stock that is opaque and impossible to see through.

The double-window design conveniently displays both the sender and recipient addresses without the need to type directly on the envelope. The top window (1 3/16" x 3 1/2") is positioned 3/8" from the left and 2" from the bottom, while the bottom window (1" x 4") is positioned 3/8" from the left and 1/2" from the bottom. A blue security-tint interior pattern discourages reading of sensitive information through the envelope exterior, making these envelopes well-suited for mailing checks, invoices, financial statements, and other confidential documents.

The Redi-Seal closure features a double-flap gummed seal that requires no moistening — simply press the wallet flap down for a secure, professional seal. The flap is positioned on the long side for easy filling and effortless processing during large mailings.