Replacement spring

A contractor from Oceanside says:
Channel length is 22" long. The stamp on the side of spring ( 2190T 28 )
Thumbnail of the uploaded file named 16347434064242132584210.jpg
Thumbnail of the uploaded file named 1634743672505612105218.jpg
Thumbnail of the uploaded file named 16347437224401480987614.jpg
Profile picture of Lauren
Lauren from SWISCO responded:

Hello, thank you for posting! 

With this combination of attachments, you could have either a 22" S380 or S385 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment.

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.
To choose the correct strength option needed, you will need to obtain the weight of the window sash and compare to the stamp option chart on our website. Please let me know if you have any questions. 
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.