Prussia gains Pomerania, then a Swedish province between the rivers Oder and Peene. In return, Prussia commits to helping Sweden against Russian attacks.
Citation:
Editors. "Treaty of Stockholm between Prussia and Sweden".
The Literary Encyclopedia. First published 01 February 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=4175, accessed 20 June 2013.]