Double Sash Balance
A handy person from Los Angeles says:
July 1, 2016
Duplex Inc. Pre-set Double Sash Balance. 8lbs per sash. I need 2 of them.
Tom from SWISCO responded:
July 5, 2016
I'm afraid I'm not familiar with that brand. Could you remove one of the balances from the window and show us a picture of it? That will help us find the best match.