Together with this letter, we are sending you …
We hereby send you …
Enclosed please find …
This envelope / this package / this box contains …
As requested, we send you …
Following your request for information of 1 July last, we are sending you …
Further information will reach you shortly / in due course.
We look forward to your order.
We thank you for your request for information and remain at your service.
We gladly remain at your service.