Replacement of window balances

A handy person from Florida says:
December 31, 2014
Can you tell me what product would replace my window balances? They are 29" long, and the only marking I see on them is 28C USB. I have attached pictures of the ends of the balance. The windows were installed in 2003.

Thanks,

Gary
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
January 5, 2015
Thanks for posting, Gary. I would start by looking at our S380-29 channel balance. Just make sure the size of the nylon attachments that come with it are the same as yours! I also recommend the 2830 option. Two balances with this option can carry a window sash weight of 16 through 23 pounds. If your sash weight falls under that range, I think you're good to go.
29" Series 380 Channel Balance
29" Series 380 Channel Balance
S380-29
$11.10
How to Replace a Non-Tilt Channel Balance
How to Replace a Non-Tilt Channel Balance
VIDEO
WATCH >
How to Repair a Jammed Window
How to Repair a Jammed Window
VIDEO
WATCH >
How to Identify Replacement Channel Balances
How to Identify Replacement Channel Balances
VIDEO
WATCH >
How to replace a non-tilt channel balance
How to replace a non-tilt channel balance
GUIDE
READ >
Choosing a Non-tilt Channel Balance: What Will We Need?
Choosing a Non-tilt Channel Balance: What Will We Need?
GUIDE
READ >
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 3-4 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 help@swisco.com.