stamped 2420 on balancer

A quick learner from Cherry Hill NJ says:
What should I purchase. The balancer is stamped 2420. Is 25.25 inches in length. Single pane window. Thank you.
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for contacting us. Start by looking at our S370-25. Carefully go over our pictures and dimensions to confirm that the nylon attachments are the same style and size as yours. I would also double check the length of the metal channel (not counting the nylon attachments). Based on your stamp, it should be 25".
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