Identify balance needed

A home owner from Brighton, CO says:
November 15, 2020
I have a window that is missing the channel balances. It is a single hung non tilt window, the sash measures 29" tall and weights 21 lbs. The channel is 1/2" deep. Can you help me identify which balance series I will need. Thanks.
Profile picture of Bob
Bob from SWISCO responded:
November 18, 2020

Can you tell me the height of visible glass in the window sash? Can you also remove a balance from an identical or similar-sized window in the house and show me pictures of the nylon fittings on either end? We'll do our best to narrow this down from there. 
Stepped Sash Guide, Alpine
Stepped Sash Guide, Alpine
18-171
$1.35
How to Identify Replacement Channel Balances
How to Identify Replacement Channel Balances
VIDEO
WATCH >
How to Repair a Jammed Window
How to Repair a Jammed Window
VIDEO
WATCH >
How to Replace a Top Sash Guide [1080p]
How to Replace a Top Sash Guide [1080p]
VIDEO
WATCH >
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.