balance replacement

Hello,

Take a look and compare the specifications of the 5/8" diameter S600 spiral balance with a red tip option to your original balances.

Unfortunately, I don't recognize the nylon parts shown in your first photo. Could you elaborate on its function and shoe us where it installs? Thank you! 

I would recommend using the S600-32 to replace your 31-3/4" balances and the S600-33 for your 33" balances.

As for the small plastic pieces, it sounds like they may be broken pieces of a pivot shoe that the balance spiral would attach to in the window jamb. If so, we would need to see an undamaged shoe removed from one of your windows, as well as confirm the exact width and thickness, to compare to our selection here. 

Unfortunately, we won't be able to identify a suitable replacement without seeing an undamaged version of the part, as well as confirming the exact width and thickness.