Aluminum 3050 single hung balancers
Thanks for reaching out! I'm sorry to hear that your have missing balances in the window. That will make it a bit difficult to identify the exact balance needed for your window, however, not impossible.
To start, are there any similar windows that do still have balances in them? If so, would you be able to send a photo of that balance removed from the window?
I'm afraid that we won't be able to identify a match for your balances without some kind of reference. There are just too many different possible configurations to be able to narrow it down.
Would you at least happen to know who made your window? That won't necessarily guarantee that we can find a match, but it might at least point us in the right direction.