EX-99.7 FORM OF CUSTOMER LETTER REGARDING NOTICE OF THE TRANSACTION
Published on February 13, 2007
EXHIBIT 99.7
February 12, 2007
Dear Valued Customer:
Yesterday, we announced that we have agreed to be acquired by Hindalco Industries Ltd. for
approximately $6 US billion. As you may know Hindalco is Indias largest non-ferrous metals
company with both aluminum primary and rolling assets. Hindalco is the flagship company of the
Aditya Birla Group, one of the top three and most well respected global business groups in India
with market capitalization of over $20 billion.
As you know, as a publicly traded company, we are legally restricted in what we can say about the
transaction at this time, however, the transaction does require shareholders approval and various
regulatory reviews. It is not contingent on financing. We expect the transaction will be
completed in the second quarter of 2007.
We are excited about the new opportunities this change provides us and look forward to stronger,
even more global operations.
I wanted to make sure you were aware of the announcement and to assure you that during this
transaction period, we will remain focused as always on providing you with excellent service and
consistently, high quality products.
You are critical to our success. We look forward to providing you with outstanding quality and
service. Please contact me if you have any questions.
Sincerely,
[Name of Manager]
[Title]
[Title]