What is my 2640 nb

A home owner from Brea CA 92823 says:
I need know what part needs to be order , I need the whole side rail with plastic part , metal bracket , spring .
User submitted photos of a window balance.
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Tom from SWISCO responded:
Hey, thanks for posting. I've narrowed this down to two possible channel balance Series: either our Series 380 or our Series 385 balances.

Now, as you can see, there is only one difference between these two Series, and that is their bottom shoe. The Series 380 uses the 15-005 while the Series 385 uses the 15-004. I can't quite tell what you have based on your pictures, though. Please carefully compare their dimensions to your own hardware and see which is a better match.
15-004 and 15-005
A quick learner from Brea 92823 says:
Hi Tom
thanks for helping to identify the parts , I measured the top and bottom shoes plastic parts its measures exactly Series 380 15-005 , 27" long metal channel is 27 ". Does the 27" long metal channel includes spring and thread. My need are the spring with the thread , Shoe top and bottom . So shall i order S380-27 , Will it include complete order of 27" long metal channel , Spring and thread and Top and Bottom shoe.

Thanks for the Help
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Tom from SWISCO responded:
Yes, our S380-27 includes everything pictured, including the spring and thread. It is not advisable to replace the spring and thread yourself, anyway, as the tension is great and there is a risk of hurting yourself.
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