Aluminum window springs

Hi there!

Thanks for reaching out to us. If your balance's shoe is 1" deep when measured as shown below, the S380-28 would be the way to go. There should also be a stamp on the back of the metal channel that you can use to determine what stamp option is needed for your replacements.

Please let us know if you have any questions!

Comparison of the S378, S380 and S385 balance shoes.