Window balance replacements

Question

Hi,
I moved into a new apartment, and the windows weren't working properly, looks like the balance springs went bad, there are 2 windows, 4 balance springs in total. I think I need to replace the window balance
THank you,
Pranay

Tom · Accepted Answer

Thanks for your photos. Based on what I see here, you have either our S380-33, S385-33, or S378-33 depending on the depth of the bottom shoe. That's the only difference between them. I recommend measuring your shoe and referring to our dimensions to confirm the best match.

Comparison of the S378, S380 and S385 balance shoes.