window glides form large windows at beach condo, rusted Need 10 pieces

A quick learner from south carolina says:
stamped with 34 9 44# 23" LT AO Caldwell
total length is 36 inches, length of metal with no end pieces is 34.25
User submitted photos of a window balance.
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Paul from SWISCO responded:
Thanks for posting. I'm not sure exactly what this is. I think you could either have our Series 390 or Series 351 channel balance, depending on the size of your shoe. I would also recommend remeasuring the length of the metal channel. It should end on the inch. Finally, I recommend weighing your sash to determine the proper stamp option.
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