We need balances for all of our windows that are different sizes.

Hi there!

Thank you for reaching out to us. I recommend either the Series 351 or Series 390 channel balances. The best fit will depend on the depth of the bottom fitting as shown below. There should also be a stamp on the metal channel that will indicate what stamp option you'll need to select. 

Let us know if you have any questions! 

Comparison of the S351 and S390 balance shoes.