window balance

Thanks for writing in. This window balance has a similar appearance to both the S380-33 and the S385-33. You'll need to confirm the depth measurement of the shoe to confirm the right series.

I believe you'll need the 3250 stamp option but it is suggested to confirm that the sash weight falls between 28 to 23lbs.

Comparison of the S378, S380 and S385 balance shoes.