Thanks for posting! The balances your customer has look like they are likely a coil balance assembly, given the mounting bracket installed in the window channel. To identify the correct replacement, I'll need to see a photo of the assembly removed from the window, especially the bottom pivot shoe.
Once we've determined the exact assembly you need, you'll be able to determine the weight needed to support the sash. There are typically stamps on the metal coil that indicate the spring strength. If there are no stamps, you'll need to obtain the exact weight of the sash. Take a look at the video below for instructions on how to remove the assembly.
In regard to the sweep lock, start with taking a look at our 90-180, 90-300, and 90-305. You'll need to carefully compare the dimensions of the existing lock to those shown on each of the diagrams for our sweep locks. They can be found on each of their respective product pages on the website.
If you are looking replace the tilt latches, I'll need to see a photo of the latches removed from the sash as well. I've tagged a video below detailing how to remove them from the sash.
Please feel free to reach out with any questions in the meantime.
![How to Replace an Internal Tilt Latch [1080p]](../../images/videoThumbnails/90.jpg)
