Please confirm this is a S380-27

A quick learner from Hercules, California says:
Dear Sir/Madam,
I need replacement for window balance which has marking of 26 4 IW CMC 11 but I measured the length is actually 27 inch and bottom fitting is 1 inch.
Please suggest if the 27" Series 380 Channel Balance (Product Code: S380-27) will be right replacement. I need 4 of them.

Thanks and Regards,
Gurwant
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Emily from SWISCO responded:

Hi, Gurwant.

You'd want our S380-27 with the 2640 strength option since your bottom fitting is 1" deep. Orders can be placed directly on our website at your convenience. 

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