window balance ID please
I'm not familiar with the Sprouse brand, so I unfortunately can't use that name to identify what you need. This is definitely a typical coil balance assembly, so we can definitely help. However in the case of coil balances, it's necessary to see a clear photo of the pivot shoe to identify the entire assembly. This is what the springs connect to and should be located in the track near the bottom corners of your sash.
The sash will need to be removed so that I can get a clear look at the shoes. Ideally, I would love to see the entire balance assembly out of the window to ensure clarity, but if that's not possible then you at least need to remove the sash and show me the shoe as unobstructed as you can manage.