40 TG BSI

Hello, Maria. We do not sell replacement window trim, unfortunately. What you're showing in this photo is actually called a jamb liner, which is the broad plastic lining that is installed on either side of the window frame. Inside the jamb liner is the channel balance, which regulates the operation of the window itself. We don't sell jamb liners, either, but we DO sell a ton of different balances. You can see our full selection here.

Is that what you needed? If so, please remove the original balance from the window so that I can get a better idea of what you have and we can work from there.