Alside window parts
Your exact Alside balance shoe is no longer made but the 15-177 Coil Balance Shoe will replace it. Be sure to take a look over the specifications and compare them to confirm.
To replace the coil springs, you'll need the 1/2" thick Series 152 Coil Balance. They are secured to the shoes using the 33-072 screw.
To determine which coil you need for your assembly, you'll need to check for any stamps markings on the metal. If there aren't any, please see the tutorial below for detailed instructions.
If you cannot reuse the coil supports, you'll need the 15-143 Coil Bushing, 15-144 Coil Bushing Cap, and the 15-145 Coil Support Barrel. All three are used together to create the new support.