Simonyi window 40-06 single hung

A quick learner from 47909 says:
Plastic cover over coiled metal is breaking on several Windows that are 15 years old.
User submitted a photo of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting! Hopefully we can help. First, determine the thickness of the coil spring inside your housing. For a 1/2" thick spring, I recommend our 15-150D. For a 3/8" thick spring, consider our 15-204 instead. Keep in mind that our new style coil spring covers now only use one installation screw.
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