Paul from SWISCO responded:
July 20, 2016
Thank you for posting. Unfortunately, the manufacturer of your window was Acorn that went out of business quite some time now. Instead of 15-004 shoe we use 15-003 shoe as a better fit in the window. With that in mind, I recommend our S710-29 side load balance. The stamp weight option is the number printed on the metal balance channel.
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