Balance weight threshold compared to measurements?

A handy person from California says:
I inquired about block and tackle balances, specifically the series 351 17". Dave suggested I measure the window to find the weight.

Does this mean you can guage the weight by the measurements? If so the window is 34 1/2" x 17 1/2". The frame is 1" thick with a single pane of 1/8". I have noting to weigh the window in the frame and I don't want to remove it from the frame.

I was able to restring the balance and get it to work. The windows are going to be replaced this Summer during an remodel. If I had to guess, the window weighs about 10 pounds. All I need is balances to last until the remodel. I hope you can help.


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Paul from SWISCO responded:
Thanks for posting, John.

You should take a look at our S351-17 Channel Balance. I think this will suit what you need.
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