Anderson window balance

A handy person from Pennsylvania says:
Please give cost per set, the number I found is w4827987 the windows are27 yrs old.

Thank you
Profile picture of Tom
Tom from SWISCO responded:
I don't recognize that number. Is that what is stamped on the balance box itself? We will only be able to identify what you have if we know each stamp printed on the balance box. It would be even better if we see pictures; sometimes seeing how the stamps are printed is just as important as the numbers themselves.
A handy person from Pa. says:
Please let me know if you received the picture.

Thanks ,Julio
User submitted a photo of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Thanks, Julio, that's perfect. I recommend our 24-837 , based on your stamp of "827."
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 4-7 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at