Just moved into a new home and have several windows with bad balances. Would like to verify the correct replacement parts and order.
Bob from SWISCO responded:
January 30, 2020
Thanks for writing in. See our S351-34 or S390-34. The only difference between these two balances is the 'depth' of the bottom nylon shoe, so compare both with your old hardware to see what matches best. You'll need a stamp option of 3330.