Need help identifying the window balance

Question

I need help in indieifying correct part ro replace the channel balance for non-tilt window. Hope the picture provide the details needed.  The impring on the balance says 3630, and the lenght of the metal portion of ths balance is 37inches.  If you need any addtional information please let me know.

Jasmine · Accepted Answer

Thanks for your post! The window balance you have reminds me of the S378-37 Channel Balance. Although, you'll need to double check that your shoe depth measures 7/8".

The 3630 on the stamp is the option you'll need to choose.

Comparison of the S378, S380 and S385 balance shoes.