Channel Balance

A quick learner from Florida says:
Could you please help me identify this channel balance. Metal channel is 32 inches long
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Bob from SWISCO responded:

Hello there. This looks like either an S351-32 or S390-32, depending on the depth of the bottom nylon shoe. Compare both with your old hardware to see what matches best. To know what stamp option to select, obtain the exact weight of the window sash, then match that exact weight with one of the weight ranges listed alongside each stamp option on the balance's shop page.

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