500 Number 10 Single Window Envelopes – Thick Gummed Seal – Designed for Secure Mailing of Quickbooks Checks, Invoices…

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Perfect for mailing Invoices, QuickBooks Invoices and checks, billing statements, checks, and other business mail.
No need for tape or glue sticks as our strong gummed seal creates a hassle free and safe seal for all your sensitive documents.
Provides complete business mail security: your professional business mail will be completely hidden with our dark security tint design
Create professional looking mail with the added security of a single window envelope. Your business mail recipient address will show through the single window and you can quickly print your return address or add return address labels
Tamper proof design with our hot melt glue adhesive manufacturing process that allows the glue to penetrate the envelope, thus causing the envelope to tear if you open after sealing