7side mail

I think you meant to type "7-sided mail"!

7-sided mail, also known as a heptagonal envelope, is a type of envelope with a heptagonal (7-sided) shape. This unique shape is designed to provide additional security and protection for the contents, as well as to make it more difficult for unauthorized individuals to open or tamper with the envelope.

7-sided mail is often used for sensitive or high-value items, such as financial documents, legal documents, or confidential information. The heptagonal shape makes it more difficult for someone to pry open the envelope or use a tool to open it without leaving evidence of tampering.

In addition to its security benefits, 7-sided mail can also be used to add a touch of uniqueness and flair to your correspondence. It's a great way to make your mail stand out and add some visual interest to your envelopes.

Do you have any specific questions about 7-sided mail or would you like to know more about its uses and benefits?