Looking for the right Milgard balance

A handy person from California says:

I'm looking for a window balance replacement. The part I currently have is stamped 26 4 ej. The window it supported ways 15 pounds and was made by Milgard. The metal channel is 27" long long and 5/8" wide. Any guidance you have would be appreciated thanks.
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Tom from SWISCO responded:
Thanks for posting. I'm confident that we carry the replacement you need, I'm just not sure what to recommend. I'm afraid all the stamp tells us is how strong your spring is, it has no relation to what Series the balance is. 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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