31 3 BX CMC Channel Balance

I'm afraid I cannot determine what you need from these photos. We will need you to remove an undamaged version of this balance and show us a clear picture of the top and bottom nylon fitting. I will also need to know the depth of the bottom fitting so that we can find one in the right size.

Please make sure the hardware you show us is whole and undamaged. It is very difficult to ID hardware that's broken or missing pieces.

Thank you! Based on these photos, I believe you have either our S380-31 or S385-31. The only difference between these two products is the depth of the bottom shoe. You will need to measure yours to confirm which one is the better choice for your window.