I am looking for this window spring the stamp on it say 4230. The length of the spring is 42" by ½" wide. I do not know the weight of the windows
Thank you for all you help
channel balance.

Quick Learner from usa
Jun 22, 2021 9:31 am
4 user uploaded images
2 Replies

Tom from SWISCO
Jun 25, 2021 12:53 pm


Thanks for your photos. Can you confirm the length of the metal channel? Based on your stamp of 4230, it should be 43" long, not 42". Either way this will have to be a custom order due to its extra large length.
I'd also like you to refer to the diagram below and tell me which measurement more accurately matches your own bottom nylon fitting. That will be a huge help.
Finally, how many did you need?
Please confirm those details and we can get the ball rolling!

Comparison of the S351 and S390 balance shoes.