Casey from SWISCO responded:
April 20, 2023
Hello, Take a look and compare the specifications of the 15-199 pivot shoe, which is compatible with the 1/2" wide S160 or 3/8" wide S165 coil springs, to your parts. For a 20-pound sash, I would recommend using two S165-5 coils or an S160-4 and S160-5 on each side, depending on the size of your original coils. Thanks for posting! |