Balance from window

A home owner from Florida says:
Window weighs 7.8 pounds
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Bob from SWISCO responded:

This looks like it might be the Series 377. You'll need to show us the bottom attachment, as well as tell us the length of the metal channel. Any stamp code on the metal channel would also be useful to know. From there, we'll do our best to narrow down what you need.

A home owner from Florida says:
writing says 17-1W. length is 17 15/16
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Paul from SWISCO responded:

Thanks for getting back to us. While similar in appearance to what Bob suggested, this is actually a custom 18" balance with a 19-041 Top Fitting and a 15-005 Bottom fitting, along with a stamp option of 1710, which is for a window sash in the weight range of 5 through 8 lbs. Bob is sending you an email with a custom link to order (2) of these balances. Let us know if you have any other questions prior to ordering. Many thanks. 

A home owner from Florida says:
Thank you. There are a few more clips that I need to order from the other window that I bought the balances for. I will check them when I get home today so I can place them on the same order. Thank you for your quick response in helping me
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Bob from SWISCO responded:

Our pleasure. Let us know if you have any other questions! 

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