choose the right ballance

A home owner from Washington says:
the stamp on my channel shows 26-3 . which one i should choose from your list. thnx
User submitted a photo of a window balance.
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Tom from SWISCO responded:
I'm actually not sure. The stamp only tells us the spring strength calibration. It has no bearing on how the balance itself is identified. You will need to carefully compare the style and size of the nylon attachments on either end of your balance to those we have on our site. You can see our complete selection here.
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