Stamp on balance is not listed

A handy person from WASHINGTON says:
Hi, I am looking for a replacement for 27" SERIES 380 CHANNEL BALANCE. The stamp on my balance reads as following: "26 4 HT CMC 4". Which option should I select to replace such a balance?

Best regards,
Art
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Tom from SWISCO responded:

Hi, Art. Sorry for the short delay. "26 4" was phased out, and they started marking the same balances "2640." That'll be the proper option for you.

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