I like to replace both balancers (left & right) on an old bathroom window manufactured by Andersen, but I like to know what is the correct part number to order them. Could you please help me with that? The numbers stamped on them, as you can see on the attached pictures are: (11600-17), (11600A-3), (419 1 B18 3 91), (3,335,455). They are the same on both balancers.
I would appreciate it very much.
Nick
