33" Window channel balance for a Millard window

A quick learner from Arizona says:
What part number are these and where can I buy them?
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Bob from SWISCO responded:

Hello there. This looks like either an S380-33 or S385-33 Channel Balance. The only difference between these two balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement, so compare both with your old balances to see what matches best. See the diagram below for reference. In either case for a new stamp option go with 3250. Both of these balances can be purchased through our online store. Let me know if you have further questions.

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.

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