1610 channel balance for aluminum window

A home owner from Portland, OR says:
September 5, 2020
We need to replace the window channel balances and top piece for 4 sets of aluminum windows in our 1980s home. I attached photos and can provide more. The stamped code on the piece is 1610. Based on your website I think we might need 16" 385 channel balance product code S385-16 and 5/8" top sash code 18-009. Can you let me know if I'm on the right track? Thanks!
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Bob from SWISCO responded:
September 9, 2020

It looks like the bottom shoe of the balance lacks wings, or those 'tabs' on each side that the top nylon fitting has. If so, this is a Series 395. Check the metal channel length. if it's 17", then you need an S395-17 with a stamp option of 1610. 

I agree the 18-009 looks promising for the Top Sash Guide, but carefully compare all the dimensions to confirm this. 
5/8" Top Sash Guide
5/8" Top Sash Guide
18-009
$0.99
17" Series 395 Channel Balance
17" Series 395 Channel Balance
S395-17
$9.34
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