Coil Balance Replacement

Hey Raul. If the coil spring is 1/2" thick and stamped 7.5, then I believe you indeed have an S160-7 7.5 pound spring. If the old pivot shoe and coil support are undamaged, you should be able to reuse them: otherwise, see our 15-111 and 15-150S. Also note, generally with window balances we recommend replacing the springs on both sides of the window at the same time. Otherwise, new springs tend to wear out faster when used in conjunction with older balances. Just something to keep in mind. Let me know if you have further questions. 

Hey Raul. For that top bumper see the 15-148. As far as coil balance longevity, we generally find balances last roughly 10-15 years, so it's not surprising that wear and tear is catching up at this point. All these parts can be ordered directly through the online store. Simply add them to your cart, and then when you're ready, click "Checkout" in the top right corner. Just don't forget to set the quantities desired. As you go through these other windows, be sure to check to ensure it's the same balance system, and if the spring weight stamped on the coils differs at all. Let me know if you have further questions at any point!  

Yes, these can work for the left or right hand side interchangeably. As for whether or not they can work for the top sash as well, in many cases it would without issue. However sometimes the top sash is a different size than the bottom sash, so I always recommend checking just to be safe. There is a fair chance you will need the same hardware, but with different weight springs.