need coil covers for windows

A contractor from Newport Arkansas says:
The coil covers have dry rotted from sun, I would like to replace them and will replace the coils as well if needed. Please give me some PN's so I can get this started.

Thanks
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Bob from SWISCO responded:

See our 15-150T Triple Support for 1/2" thick coils, or our 15-205 for 3/8" thick coils. You'll need to measure the thickness of your old coil springs to confirm which you need. Let me know if you have further questions. 

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