Emails - notification administrator - code

Hi,
I would like to know how I can obtain the "code" of a product in the email sent to the administrator when a product is ordered?
Thank you!

Thank you. So the code is:
<p><?php echo $item->order_product_name . ' (' . $item->order_product_code . ')'; ?></p>
But where I must copy it into the email document "Order administrator notification"?
Any place or a precise place of the document?

Thank you fo ryour answer!
To follow the possible updates of this email: is it possible to include in this email to the administrator the indication of the shipping (using USPS) chosen by the customer?