Balance rod replacement

A handy person from Hernando Florida says:
These are nu air windows. The numbers printed on the rod is
34 5 DW CMC 11.
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Bob from SWISCO responded:

Thanks for posting. Please confirm that your metal channel, not including the end attachments, is 35". If so, see either our S380-35 or S385-35 Channel Balances. The only difference between these two Series is the 'depth' of the bottom nylon shoe. With the Series 380 the depth of this nylon shoe is 1", whereas with the Series 385 it is 1-3/32". Compare with your own and see what is best.

Once you know which balance to select, you must choose a stamp option. Your stamped number of 34 5 conforms to our stamp option of 3450, for a window sash in the weight range of 30 through 34 lbs. Let us know if you have any questions.

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