Need replacement balance for Jeld-Wen tilt sash single hung window

A handy person from palmetto Fl says:
Window dimensions are 49 1/16 x 18 5/16
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Bob from SWISCO responded:

What is the diameter of the outer tube? If it's 3/8", you need a Series 900; if it's 5/8", see the Series 600. To know what Color Tip to select, weigh the window sash. A bathroom scale would suffice. You can then match that weight with one of the weight ranges listed alongside each Color Tip option on the balance shop pages.

How to replace a tilt window spiral balance.
How to replace a tilt window spiral balance.
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How to Identify a Replacement Spiral Balance
How to Identify a Replacement Spiral Balance
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How to choose the proper spiral balance tip color
How to choose the proper spiral balance tip color
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How to adjust a spiral balance on a tilt window
How to adjust a spiral balance on a tilt window
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