Hello, I am looking for replacement balances for older aluminum non tilt windows. Please see attached photos. The identification stamped says B.S.I. AA 2840. The channel depth is 5/8 and the width is 9/16. I will also need some with a number of 2820 and 2830. Thank you!!! Tony
Tom from SWISCO responded:
June 21, 2018
Hey, Tony. If you have the 1" shoe shown below, choose S351-29 balances. 2820, 2830, and 2840 are all offered as options for that balance.