window balances 2730 and 2740

A home owner from Sacramento says:
I need to replace the balances on my windows. I have 2730 and 2740 balances, length is 28". I've included pictures of both the top and bottom of each balance.
User submitted photos of a window balance.
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Paul from SWISCO responded:
Please see our Series 350 channel balance, this looks to be a good match.
A home owner from Sacramento says:
thank you. Would the Series 350 channel balance work for both the 2730 and the 2740 balances? The 2740 window seems slightly bigger than the 2730 window.
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Tom from SWISCO responded:
The stamp options refer to the strength of the spring. It makes sense that the stronger 2740 is on the larger window. The S350-28 balance has both the 2730 and 2740 options available. I recommend visiting the link I sent you and looking over the details on this hardware's store page, there is a lot of helpful information there for you to consider.
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