channel balances

A handy person from Los Angeles, California says:
Hi, I need to identify and order the attached channel balances in these pictures, : the measurements are 9/16" x 30" for the channel, 9/16" width on the top end piece and 7/16" width and 1" front to back on the bottom piece; the number stamped on the channel seems to be: 29C USB or 290 USB.
Hope this is enough info to help to identify them.
Thank you,
A SWISCO guide to identifying balance shoes.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting, Louie. Please take a look at our S385-30 Channel Balance with a 2930 stamp option. I believe that this will work for your windows!
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