Block and Tackle Assembly for a Crestline Wood Clad Double Hung Window

A home owner from Waterloo, Iowa says:
I need a replacement for the entire assembly. 28HD is stamped on the metal extrusion part of the assembly.
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Tom from SWISCO responded:
We may be able to help, but I cannot identify what you have based on this information alone. I recommend that you look at our Channel Balance Home Page and follow the steps in order to find the Series that best matches what you have.
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