Is this the correct balance?

A home owner from Augusta, GA says:
There is a stamp on the channel with the following: 3400 BSI LG
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Based on this picture, I would recommend our S770-34 channel balance with a 34B option. Two balances with this option can carry a window sash weight of 16 through 22 pounds. Would this work for you?
A quick learner from Augusta GA says:
That is what thought but wanted to be sure. We also need some in a 29 length. Thanks and we will be placing an order.
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