Tom from SWISCO responded:
September 28, 2020
Hello! Your shoe looks like a match for our 15-199, which is designed to be used with either the Series 160 coil spring. I am confident that these parts will work for you. |
Tom from SWISCO responded:
September 30, 2020
If your old springs don't have stamps, then you'll have to weigh your sash on a scale, then divide that by how many springs support it; in your case, four. That should tell you which weight option to pick for the individual springs. For the cover, I recommend the 15-150D. |