2730W BSI Channel Balance

A quick learner from Cool, CA says:
I'm tring to find the repalacement part for a bsi 2730W. It looks like it is one one the foolwing but I can not tell what the difference are. The top and bottom shoes look like one of the following: 350, 380, or a 385

The length of the steel channel is 28". Width 9/16". Depth 5/8"
User submitted photos of their 2730W BSI channel balance
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting! Before I can offer an applicable replacement for this channel balance, I just need to know a bit more information about the bottom attachment. Please take a look at our 15-004 and 15-005 channel balance shoes, and note their depths. As you can see, they are 1-3/32" deep and 1" deep, respectively. Which one more closely matches your own bottom attachment?
A quick learner from Cool says:
It measures 1-3/32"
Profile picture of Tom
Tom from SWISCO responded:
Thank you! In that case, I recommend that you look at our S350-28 channel balance. I would also recommend the 2730 stamp option, based on your image. This can support a window sash weight range of 13 through 19 pounds. Does your sash's weight fall within that range?
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