Replacement window channel balances

A home owner from Ocala, Fl. says:
April 13, 2018
I need two balances.. I want to make sure I order the correct one.. the only markings are 29 9 BSI. I have enclosed a picture of the markings also.. thank you
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Tom from SWISCO responded:
April 16, 2018

Initially, this looks like the S350-30 channel balance, but the top attachment is so mangled that I can't tell. Is the other balance from the same window in better shape? Is there another window with the same balances that you can look at? See if you need S350-30 and get back to us. You will also need to weigh your window sash, so remove it and do that before you report back.
30" Series 350 Channel Balance
30" Series 350 Channel Balance
S350-30
$11.52
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