500 No. 9 Flip and Seal Double Window Security Envelopes – Designed for Quickbooks Invoices and Business Statements with Self Seal Flip Press and Seal Flap -Number 9 Size 3 7/8 Inch X 8 7/8 Inch

Price: $34.49
(as of Jun 07, 2026 03:03:01 UTC – Details)
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No. 9 Business Envelopes for QuickBooks Invoice Alignment – Businesses and accounting teams mailing invoices use these #9 double window security envelopes, self seal, designed to align with QuickBooks invoice layouts so both return and recipient addresses display clearly through the two windows for accurate billing.
Double Window Envelopes Self Seal #9 with Flip and Seal Speed – Office staff and billing teams handling high-volume invoicing use these self seal double window envelopes with a flip-seal closure that allows users to fold and press to seal quickly, reducing handling time and eliminating peel strips or moisture.
Self Sealing #9 Invoice Envelopes with Security Tint Privacy – Businesses mailing invoices and statements use these tinted double window security envelopes with a printed security tint that helps reduce read-through, protecting account details during accounts receivable, client billing, letters, and statement mailings.
Exact #9 Fit – Offices and administrative teams use these #9 window envelopes measuring 3 7/8 x 8 7/8 inches, which hold standard invoice folds for consistent insertion when mailing one to 2-page statements and billing documents.
24lb White Paper, 500 Pack – Small businesses and offices use this 500-count pack of #9 double window envelopes made from 24lb white paper to maintain a dependable supply for recurring invoicing, statement cycles, and daily billing workflows.