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500 No. 10 Security Envelopes - Gummed Flap - Tamper Proof Design - Security Tinted with Printer Friendly Design - Number 10 Size 4 1/8 x 9 ½ Inch - Pack of 500
500 No. 10 Security Envelopes - Gummed Flap - Tamper Proof Design - Security Tinted with Printer Friendly Design - Number 10 Size 4 1/8 x 9 ½ Inch - Pack of 500
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#10 Windowless Security Envelopes Create Completely Secure Mail

We understand how difficult it can be to find secure envelopes that completely secure and hide your envelope contents throughout the mailing pr...

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Product Review

#10 Windowless Security Envelopes Create Completely Secure Mail

We understand how difficult it can be to find secure envelopes that completely secure and hide your envelope contents throughout the mailing process. We understand this frustration; thus our envelope design protects your contents.

Windowless Design is the safest type of envelope. Easily print, write, or add labels to address the envelope

Quick and easy to use gummed seal design this has a strong adhesive that completely secures your contents to prevent them from falling out and being lost or shown to others

Dark Black security tint that is completely opaque and blocks others from seeing your documents

Thick and durable White Paper stock that completely protects your contents during transit. No need to worry about tearing of the envelope

Save time sending your mail

Our low profile design makes for easily printing in most HP, Epson, Brother, Cannon, Xerox, and other standard laser and ink jet printers.

100% Money Back Guarantee

We stand behind our products completely. We understand that sometimes buying physical products can be difficult if you cannot physically see what you are buying, however, if our product is not exactly what you are looking for, or does not meet your expectation then send them back anytime for a 100 % refund.



  • Perfect for secure everyday home and business mailing. Our Security #10 Envelopes perfectly fit standard 8.5'' x 11'' paper sizes and other large documents. Easily fits invoices, letters, checks, and more.
  • Provides complete mail security. No need to worry about others seeing your documents, our dark black security tint completely hides you mail.
  • Cost saving Gummed seal. Save money and time sealing our strong gummed seal envelopes. No need for tape or glue sticks.
  • Easily print hundreds of envelopes with our low profile envelope design. Our Printer friendly envelopes with smooth thick paper saves you time and frustration while printing without having to worry about jamming. These envelopes are designed for both Laser and Inkjet Printers.
  • Prevent others from tampering with your mail with our tamper proof design with gummed seal that penetrates the paper. Once the envelope is sealed, the envelopes has to be ripped to get inside.

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