Window Balance 33 3 BSI NN

A handy person from Chula Vista says:
September 22, 2017
I need two of these but the stamp number doesn't match any of your four digit options. It is two digits; 33 and it also says 3 BSI below that. Which stamp option is the right one?
channel balance stamp
Profile picture of Tom
Tom from SWISCO responded:
September 27, 2017
"33 3" is usually the stamp for a 34" balance with a 3330 option. Double-check the length of your metal channel. It should be 34", not 35". If not, you should let me know, because we would need to do some investigating to figure out why the numbers don't match.
34" Series 395 Channel Balance
34" Series 395 Channel Balance
S395-34
$11.73
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.