The Numbers printed on the window balance are : 28 4 LW CMC 7 . The length of the metal balance is 29 inches. The width is 5/8 (I think 9/16).
As for the top sash guides they look very very similar to Top Sash Kinko Guide 18-166.
I will probably order 2 balances and 10 top sash guides.
Thank you very much, Alex B
