Need help- window balance weight?

A handy person from Sacramento says:
I plan to 30" Series 351 Channel Balance (2960) to replace a broken one in my non-tilt window. My question concerns what is stamped on the balance. It says, "29 6 HS or H5 Caldwell."

The reference numbers provided are 4 digit and the numbers on my balance are 3 digit.

Bill
Profile picture of Tom
Tom from SWISCO responded:
A stamp of 29 6 usually corresponds to our 2960 option. You can also weigh your sash and refer to the S351-30 option chart to confirm.
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.