Balance ID

A quick learner from Lakeland, FL says:
April 4, 2016
I ordered S770-28 but it is not the same as my old balance.
I have attached the pictures from my old channel balancer( The old channel balancer has a 28F stamped on it, but the overall measurement from metal tip to metal tip is 29 inches and 30 inches with the hardware. The old channel balancer and the new one are the same exact width. Please help.
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
April 6, 2016
Thanks for posting. This looks more like our Series 380 channel balance. This comes with our 19-005 and 15-005 pre-attached before delivery. With a stamp of "28F," the metal channel should be 29" long. I recommend confirming that to be sure. I would also recommend the 2860 option based on that stamp.
A quick learner from Lakeland, Florida says:
April 6, 2016
Thank you for your knowledge. What is the 2860 option?
Profile picture of Tom
Tom from SWISCO responded:
April 6, 2016
The option determines the strength of the spring. "28F" typically corresponds to our "2860," but you can always weigh your sash to confirm.
29" Series 380 Channel Balance
29" Series 380 Channel Balance
S380-29
$11.10
28" Series 770 Balance
28" Series 770 Balance
S770-28
$12.70
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 tilt-window channel balance.
How to replace a tilt-window channel balance.
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.