guides and springs

A quick learner from brooklyn says:
April 25, 2023
dear swisco-
looking to replace springs and guides for (I believe Crystal brand) tilt double hungs. The tubes are 38" long- Orange tip- 5/8" diameter. The Guide is 1/2" thick-glass is 7/8" insulated.
Can you help me identify - or do i need to remove one of the sashes? ( release pin on the sash underside style)-
Lmk-
Thanks a lot
David
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Lauren from SWISCO responded:
April 26, 2023

Hi David, thank you for posting,

Based on the dimensions provided, please review the S600-38 spiral balance as a replacement option. For the pivot shoe, you will need to remove the original to obtain accurate dimensions of the width and thickness of the shoe. Please provide these dimensions to move forward. Thank you! 
38" Series 600 Spiral Tilt Window Balance
38" Series 600 Spiral Tilt Window Balance
S600-38
$10.65
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
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How to adjust a spiral balance on a tilt window
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