Option for 29 3 Channel Balance

A quick learner from Orlando, FL says:
I need to replace channel balances originally from Caldwell. The information on the balance is "29 3 DN Caldwell". The metal part length is 30". Every thing looks ok if I would order the 30" Series 380 Channel Balance. The question I have is which option I have to choose?

Could you help me here?

Profile picture of Donna
Donna from SWISCO responded:
Hi Michael,
For a 30" Series 380 Balance with the markings 29 3, choose stamp option 2930.

A S380-30 balance with stamp option 2930 will carry a window sash weight range of 16 through and including 23 pounds.

This information is based on 2 balances per sash. Balances are designed assuming friction from the jamb weatherstrip will carry a portion of the sash weight. Suggested sash weights are approximate.
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 856-317-6263 or at help@swisco.com.