What does option mean?

A quick learner says:
November 14, 2009
what does option mean for the S380-31?
Profile picture of Casey
Casey from SWISCO responded:
November 16, 2009
If you cannot locate the stamp number on the original balance please remove the window sash and place it on a scale.
The weight of the window sash is needed to determine the proper stamp option.
Series 380, 31 inch
Stamp Option 3010 will carry a window sash weight range of 7 through 12 pounds
Stamp Option 3020 will carry a window sash weight range of 12 through 16 pounds
Stamp Option 3030 will carry a window sash weight range of 16 through 23 pounds
Stamp Option 3040 will carry a window sash weight range of 23 through 28 pounds

This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
31" Series 380 Channel Balance
31" Series 380 Channel Balance
S380-31
$11.30
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.