Expandable security window envelope one-inch 500/box

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Expandable security window envelope one-inch 500/box

Expandable Security Window Envelope, One-inch, #10 1/2, White, 500/box
Durable envelope is designed specifically for multi-page documents and enclosures. Heavyweight paper ensures tear-free expansion. Large flap with extra adhesive provides a secure seal. Postage saver envelope. Envelope Size: 4 1/2 x 9 1/2;