Double Hung Window. Lower window not sure of name of part maybe lock pivot shoe

This appears like this may be a double coil spring system. Let's have you start with taking a look at our 15-181 double support clip. From there, look over the 15-180 coil balance shoe. These can be used with the Series 190 coil spring. See if all of these parts are a match to what you have. For the coil, please get back to us with the stamped number on the spring in order for us to provide you with the correct part number.