coil spring is 1/2" thick. I will need both sides and would like to replace all three pieces. I noticed there is a rubber grommet on the top piece. Also I have 27 windows of which 16 are double hung windows. for now I need just the 1 set (left and right) for the bottom window. Don't know how long these coil springs are supposed to last, but I had these installed in 2006 by the Window Factory based in San Diego. Like to get these as soon as possible.
Thank You Bob,
Raul
Bob, are these parts interchangeable for the top and bottom window as well as left and right side of the same double hung window?