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Our #9 double window envelopes are ideal for mailing documents where both the sender and recipient addresses need to be visible through the envelope. The two transparent windows are positioned to align with standard business documents, eliminating the need for address labels or additional printing.
Constructed from durable, high-quality paper, these envelopes are commonly used for invoices, statements, notices, and other business correspondence. Designed to fit standard #9 inserts, they offer a professional appearance and smooth performance for everyday office mailing needs.
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