Mastic Window parts

Thanks for writing in. Yes, it sounds like the balances are worn out or broken. We would be happy to help, but we need more information to narrow down what you need. Can you send us pictures of the balances in question? That will help narrow down what you need.

That definitely narrows it down considerably, yes! You appear to have a tilt window spiral balance. There are now two choices ahead of you, and it will depend on one particular measurement: the diameter of the outer tube that encases your balance. You will likely have to remove yours from the window to measure it accurately. Keep in mind it's the outer tube, not the inside spring.

If the outer tube is 3/8" in diameter, then we recommend the Series 900 spiral balance. If it's 5/8" or 9/16", I suggest our Series 600 instead. For more information, check out the videos below.

Thanks for posting. These look like our 26-228 and 26-229 Tilt Latches. Look over the dimensions and let me know if these match up with what you need. 

Hello, Michael. You will need all new glass if the seals have failed. Unfortunately, we don't provide that kind of service; I recommend contacting a local glass shop near you for assistance.