Window Sash Balance Replacement

Thanks for posting. It looks like you have a coil balance shoe like our 15-180. This is usually used with the series 190 coil balance. You have two coils on each side of your window so you will need a Double Support Detent Clip, 15-181. There should be a number printed on the metal coil close to where it attaches to the shoe that indicates the number of pounds it can carry. If you can't find that you will need to weigh your sash and then divide that weight by four. Each coil will have to carry that number of pounds. Let us know if you have questions.