Milgard DH Channel balance

A contractor from Redwood City, CA says:
I'm having trouble locating these and was hoping you could help.
I need 4 of each type of balance (see pics) for Milgard DH windows.
I'm looking to get heavier springs because I installed sound glass in the existing windows and they are a bit heavier because of the laminated glass.
User submitted photos of window balances.
Profile picture of Donna
Donna from SWISCO responded:
Thanks for posting! It looks like you have Series 765 channel balances. Does that look about right to you?

Based on your stamps, I'd recommend our S765-22 with the 21-5 option for the smaller balance, and the S765-24 with the 23-5 option for the larger balance. Take a look at these products and tell me if you think they'll work for you.
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