SWISCO - The Replacement Hardware Authority

Series 390 Channel Balances

A quick learner from Moline, IL says:
I replaced several of these in a rental house but the ones for the small window above the tub were missing altogether. I think I need a 16" or a 17" based on measurements of the balances and springs for the larger windows in the house. These are vinyl doubel pane windows. The sash for the small window is 18" high on one side (front or back, I don't remember which) and 17 3/34" on the other side. Which balance do I need?
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Paul from SWISCO responded:
Based on your measurements, you may want to go with 17".
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