Coil balance replacement

A quick learner from Ann Arbor, Michigan says:
I recently bought this from you: Sash replacement, DMSHWI29 313x29 .938 04510030160004.

I now need the balance assembly and spring. We think there may be a piece of metal missing from the bottom of the spring.

Please let me know if you have these, how much they are, and how long it would take for them to get to Michigan.
User submitted image of their window hardware.
Profile picture of Paul
Paul from SWISCO responded:
I believe you have a 3/8" wide coil, which in turn uses our 15-111 pivot shoe and 15-204 coil dual support. Please carefully review this hardware to confirm that they match. If you do have a 3/8" wide coil spring, consider our Series 165 as a replacement. You will need the numbers off the old springs to determine the proper option.
How to replace a window coil balance
How to replace a window coil balance
VIDEO
WATCH >
How to Replace a Triple Coil Balance System
How to Replace a Triple Coil Balance System
VIDEO
WATCH >
How to remove window pivot shoes
How to remove window pivot shoes
VIDEO
WATCH >
Anatomy of a tilt window
Anatomy of a tilt window
VIDEO
WATCH >
Removing a Triple Coil Window Balance
Removing a Triple Coil Window Balance
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.