Window Balance 2940 BSI

A home owner from Sunrise FL. says:

I need 4 window balances. The stamp number is 2940 BSI and the length of the metal channel is 30 inches.

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Tom from SWISCO responded:

That information doesn't tell you what to buy, but our channel balance guide does. Choose a Series, then select the 30" version and a 2940 option.

A home owner from Florida says:

Here are photos of the channel balance I am trying to replace.

Thanks

User submitted image of their window hardware.

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Tom from SWISCO responded:
Thank you. Based on your pictures, I would recommend either our Series 390 or Series 351 depending on the size of the bottom shoe.
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