29" long Tubular Spiral Window Balance for single hung window with blue bushing (see pictures)

A quick learner from Sagamore Hills, Ohio says:

Could you please recommend a part number to match my window balance. The blue bushing seems to be slightly internal (see picture). The tube is made of plastic.  

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Bob from SWISCO responded:

Thanks for posting. The outer tube looks to have a diameter greater than 1/2" and close to 5/8"; furthermore, only 5/8" tilt window spiral balances have a blue tip option. Therefore, see our S600-29. Let me know if you have further questions. 

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
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How to choose the proper spiral balance tip color
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How to adjust a spiral balance on a tilt window
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