I need the entire channel balance replacement part for a viking window. The length is 21". The width of the top part is 1'. Two stamp markings 2030 and BSI...I think. There is also a DL stamp but I do not think that stamp is useful. The windows were purchased in 1999 or 2000. The window does not tilt. Based on the pictures of a replacement part I think I need to order S385-21,, but would appreciate your expertise.
Thank you.
Mike