Non tilt channel balance replacements

A handy person from USA says:

I need balance rods for non tilting windows as follows:

1/2 in wide
30 inch long
19-005 on top
15-001 on bottom

Product code S395-30.

So far so good.

My broken balance rods have, what appears to be 29 6 BSI LB, stamped on them. "BSI" is stamped vertical with B on top. I'm not sure it says "LB". The stamping is rather weak.

The windows are double pane with aluminum frames. The part that slides up and down is about 45 inches wide and 30.5 inches tall.

I don't see 29 6 on your options list.

Which option would you recommend?

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Tom from SWISCO responded:
A stamp of "29 6" usually corresponds to our 2960 option. That said, you can always weigh your sash to confirm. We have a chart on the S395-30 store page that lists how much weight each option can support.
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