parts
Thanks for posting! The coil balance shoe from your assembly is similar in style to our 15-180 Coil Balance Shoe. To confirm that this is the right fit, carefully look over the dimensions below and compare them.
This assembly uses the Series 190 Coil Balance, secured to the shoe using the 33-073. Since one of your coils is stamped with a 9, it is likely you'll need the S190-940 to replace that coil. You'll need to double check that the other coil has the same or a similar stamp to determine the correct replacement for that one.
If you are unsure or the stamp is hard to read, you'll need to obtain the exact weight of the sash and divide that number by 2. Since one of them is already confirmed to be a 9lb coil, you'll subtract that to get the spring strength you need for the other coil.
The support clip and the bushing used inside of the coil are the 15-181 Double Support Detent Clip and the 15-182 Coil Bushing.
Please don't hesitate to reach out with any questions.