Identify Window Channel Balance parts

A quick learner from Boston says:
May 26, 2020
Hi,
Planning to replace Window Channel Balances on aluminum windows.
Pictures attached.
Thank you,
Lenny
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Tom from SWISCO responded:
May 28, 2020

Based on your photos, you have either our S390-28 or S351-28. The only difference between them is the size of the bottom fitting, which is indicated on their respective store pages. You'll need to measure your bottom fitting to confirm which one is best. 

For your top sash guide, I recommend the 18-110.

Comparison of the S351 and S390 balance shoes.
Comparison of the S351 and S390 balance shoes.
Top Sash Guide, SeasonAll
Top Sash Guide, SeasonAll
18-110
$1.70
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