24S2GL window sash balance help

A quick learner from USA says:
Help... The 24S2GLis 25" long the 22s is 23" long ... I need 5 sets going to replace all...windows are maybe 15 years old double hung wood, plastic sash... HELP... Thanks Bob
User submitted photos of a window balance.
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Paul from SWISCO responded:
Hey, Bob. Your balance looks a lot like our Series 751 channel balance. Check it out and let me know if you agree. I can't make out the stamp on your metal channel, but you can always weigh your sash to determine what option is correct.
A quick learner from Costa Mesa Calif. says:
Thanks Paul maybe this will help.. I need 5 sets.. (5 windows) 5 23" 5-25"
User submitted a photo of a window balance.
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Paul from SWISCO responded:
Thanks! Yes, our S751-23 and S751-25 appear to be the best matches, but you will need to weigh your sashes to determine the correct option for both.
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