Proper top and bottom for my balance?

A quick learner from Pennsylvania says:
Hello, My Window Balnace says 1610 so the lenght is 17", what are the proper top and bottom guides for this one?
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Tom from SWISCO responded:
I'm not sure. The stamp only tells us how strong the spring is. I'm afraid it has no correlation to the Series. I recommend that you look at our Channel Balance Home Page and follow the steps in order to find the Series that best matches what you have.
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