Searching for 38 5 fs caldwell

Hello,

We'd be happy to help but the stamp code oly tells us the spring strength needed to support the weight of your window. We would need to see the fittings attached to both ends of an undamaged balance removed from the window to narrow down your replacement options. Thank you! 

With this combination of attachments, you could have either the S380-39 or S385-39 channel balance. You’ll need to measure as shown below. Keep in mind that the length should only include the metal channel and not the end fittings. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. 

The S385-39 offers 3850 strength options to support a window sash between 30-35 pounds. If you need the S380-39, just let us know since our stock options only go up to 3840 at this time. Thank you.

Comparison of the S380 and S385 balance shoes.

Great, then you are welcome to purchase the S385-39 channel balance with 3850 strength options directly on our website. Just let us know if you have any other questions.