is this sentence structured correctly?

Nastaran Asgari grantee our insulation products

What does that mean, Nastaran?

I think you mean guarantee.

A grantee is a person who receives a grant (like a scholarship, or money for a charitable cause.)

A guarantee is a statement that if you buy a product, the company will pay you or replace the product if it fails.

Also, you have two sentences. Separate them with a full stop, and use "it," not "that."

There is a construction company. Here is their product grantee document which is tried to thankful their customers for choosing them. And also, there would be a few terms about their grantee.

Thank you, I got the point.

Nastaran AsgariThere is a construction company. Here is their product grantee document which is tried to thankful their customers for choosing them. And also, there would be a few terms about their grantee.

Try again. It is still incorrect.

What do you think about this sentence?

"Our company is thankful for your choosing, we would be pleased to inform you
about our insulation products under these terms for 10 years"

Nastaran AsgariWhat do you think about this sentence

It is a poor sentence. I don't understand the last part at all.

Thank you for choosing our company.
We would like to tell you about our 10-year warranty for all our insulation products.

Terms are usually related to purchasing and paying for the products.
Also, we have generous term

Thank you for your attention.

Nastaran AsgariThank you for your attention.

That is a very good sentence.