Spiral Balance
Thanks for reaching! To determine if there is a spiral balance that we can recommend to you, we'll need a bit more information to be able to confirm the length.
To start, are there any other windows in the home that are similar to the one with the missing balances? If so, this will help a great deal in deciding the type of balance you need.
If there is no similar window, I'll need to know if this is a tilt verses a non-tilt window. I'll also need to know the height of just the visible glass from the window and the exact weight of the movable sash.
I cannot guarantee that we will be able to recommend a replacement but this information will help to put us in the right direction.
Let me know if you have any questions.