Replacement balance cartridge 23 4 Caldwell LM

A handy person from Oakland, Ca. says:
the metal portion is 24" long & 9/16 deep
it's embossed with "23 4 caldwell LM"
A customer submitted photo of channel balance attachments.
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Donna from SWISCO responded:
Thanks for posting! Please take a look at our S385-24 with a 2340 stamp option. Do you think this could work for you?
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