Identifying a Replacement Part

A handy person from Pahrump, NV says:
metal track is 27" numbering on the track is 26 4
see attached photos

I need the correct part number before I order 8 to 10 of these,

Thank you
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Emily from SWISCO responded:

Hi there!

With this combination of attachments, you could have either an S380-27 or S385-27 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. You will also need a spring strength option of 2640. 

If you have any further questions just let us know! 

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