Looking for replacement balance caps for older windows

Hello,

Your top sash guide resembles the 18-032 at first glance. The dimensions would be the determining factor. Take a look and compare the measurements below to confirm if it's a match. Thanks for posting! 

Front view of 18-032

Side view of 18-032

Great! Just let us know if you need anything else. 

Unfortunately, we can't be sure of the balances your windows need without seeing the originals. If you have an identical window in the house that still has the original balances, please send over some photos of the assembly uninstalled. You'll also need to measure the height of the visible glass and weigh the sash of your windows with missing balances to determine the specifications needed for the balances once we determine the series that you need.

It looks like you have either our S351, with a 15-002 bottom attachment, or S390, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. 

If this window is the same brand and size as the windows with missing balances, you'll need 2310 spring strength options for your replacement balances. If you decide to give them a try and run into any issues, our return policy can be found here. Thank you!

Comparison of the S351 and S390 balance shoes.