Good morning sash balance has a part number 3672 calwell bm typed on it and it is 32 1/4" long and looks like your S745-32 would this be the correct replacement?
Thanks Brian
Paul from SWISCO responded:
May 24, 2016
I would start by looking at our S745-32 with a 31.25-4 stamp option. Carefully go over this product to confirm if it's a match.