I am missing one of these springs. It clips in the top of my sliding screen door and runs inside a tract. It is 4 1/8 inches long. The door is between 25 and 30 years old.
Tom from SWISCO responded:
April 9, 2019
Hello! This looks just like our 86-012 tension spring. The length seems to match, too. Look it over and let me know what you think.