need to find replacement for channel balance

A quick learner from delaware says:
Hi, I attached images of the channel balance to be replaced. the stamp reads "30 3 DN CALDWELL". The lenth is 31 and the width is 1/2.Thanks a lot.
User submitted picture of 30 3 DN CALDWELL channel balance.
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Paul from SWISCO responded:
Thanks for posting. Please take a look at our S385-31 with a 3030 stamp option. Do you think this might work for you?
A quick learner says:
thanks for your reply. the balance top matches with the measurement of the one you recommend. However, for the balance shoe, one measurement is a little less than 15-004, i.e. the width from the front to the back. It shows 1&3/32 in 15-004 while mine measures about 15/16. Not sure if that's an issue. BTW, just want to confirm "30 3 DN" means "3030"?
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Paul from SWISCO responded:
I see! Thank you for catching that. If the depth of your shoe is closer to 1", then, it would be better if you go for a S380-31.

And yes, traditionally a stamp printed like yours would translate with a 0 at the end.
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