When I measure the channel width with calipers I get 0.6" and a depth of 0.61" (this is measuring the metal spring casing). The metal casing is 31" long. The end fittings are winged. These are original windows from a home built in 1984. There is a stamp on the metal spring casing that looks like 3020(Z)?. The last digit/letter is a guess. It looks mostly worn away.
I'm going through all of the windows in our home and they all seem to need springs it seems. This is the worst one and I'm starting with it.
Thank you for your assistance!
Keith
