Double hung window balance coils

A quick learner from Morrisville NC says:
The coils both broken and Could you let me know what is the coil part number? My sash weighs 12.25 lbs. Thanks. Yiying
User submitted a photo of a coil window balance.
Profile picture of Paul
Paul from SWISCO responded:
Thank you for posting. Based on your picture and the weight of your sash, I recommend that you consider our S190-640 coil spring.
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