Sash balance

A home owner from USA says:

I need a pair of "27 4 IX CMC11" sash balance? Do you carry it? What is the order number and cost? Attached are two pictures of the sash balance we need. Kindly please provide me with an order number and cost/shipping.
User submitted image of their window hardware.
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Tom from SWISCO responded:
Thank you for posting, this could be either the S385-27 or the S380-27. I am unable to see the shoe depth so I am unable to confirm. I suggest you review both and compare the shoe size to yours to determine the better match. In either case you can go with the 2740 option. Hope this helps!
A home owner says:
Hi Tom,
Thanks for your previous response! Hopefully you can see the shoe depth from these pictures. Please confirm, thanks!
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Tom from SWISCO responded:
Looks like your new pictures are the same as above. I'm afraid I cannot determine your shoe's depth. I highly recommend carefully going over each balance, their dimensions and information, and the dimensions for the shoes that come with them (15-004 and 15-005 respectively). Then, compare everything you see to your own hardware to determine which is closer.
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