Balancer for double hung windows came undone

A quick learner from Stamford, CT says:
Hi, I attached images for the components I need. The top window piece is falling down and it appears the metal coil came out of the casing for the balancer.

I was searching your catalog but couldn't seem to find the component that exactly matches mine. Can you please help me locate it so I can order it, I measured the metal encasement at 18 inches and the thin coil at 19 inches.

Thanks,

Sam
Balancer for double hung windows came undone
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Tom from SWISCO responded:
The best replacement part would depend on the diameter of the outer tube. If the diameter is 3/8", see our Series 900 spiral balance. If it's 5/8" or 9/16", see our Series 600 instead.
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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