Need help identifying replacement parts for my window

Thanks for posting. It looks like you need what we call channel balances. Channel balances are those metal channels in your window tracks; they are spring-tensioned to help regulate the opening and closing of the window. I'm confident we can help replace yours, but we'll need you to remove them and tell us the length, and show us any attachments, hooks, or fittings at either end of the metal channel. Also show us any stamp on the metal channel. From there we'll do our best to ID what you need. 

Thanks! The balance in question appears to match our Series 751. Look over its details on its store page in our catalog to confirm.

As for the housing, that's the jamb liner. We unfortunately don't sell these. If yours has to be replaced, then you will need to contact the original maker of the window.