Need replacement channel balances

A contractor from West Sacramento CA says:
The channel is 27"
Marking stamp on it is:
26 4 IV CMC 8
No other markings found
I need 5 of them please
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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'll also need a spring strength option of 2640.

If you have any further questions just let us know!

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