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The BUSINESS SOURCE BSN04644 is a box of 500 No 10 plain white self-sealing envelopes designed for high-volume business correspondence. Built from 24 lb paper stock, these envelopes use a double-flap construction that keeps the adhesive strip protected until the moment of sealing. No moisture is required. To seal, raise the lower flap and press the upper flap firmly down. The result is a secure closure that holds without the gum pre-sticking during storage or handling. These are a practical choice for offices, mailrooms, and any operation moving a consistent volume of invoices, statements, or standard documents.
These envelopes are sized for standard No 10 applications, which accommodate a full-size sheet folded in thirds. They are suited for mailing invoices, business letters, remittance documents, and general office correspondence. The self-sealing mechanism reduces sealing time compared to traditional gummed envelopes, making them efficient for batch mailing runs in both small offices and larger mailroom environments.
Designed as a standard No 10 envelope compatible with typical desktop and commercial postage meters, envelope feeders, and laser or inkjet addressing equipment used in general business mailroom operations.
No tools required. Store boxes flat in a cool, dry environment to prevent premature adhesive activation. When sealing, raise the protective lower flap fully before pressing the upper flap to ensure a complete bond. Do not run sealed or pre-folded envelopes through laser printers or envelope feeders not rated for sealed stock.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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