1/2 channel balance replacement

A home owner from Kingsburg Ca, 93631 says:
Good morning,
I am looking to replace the channel balances on 8 windows in my home. (16 total replacement pieces). It appears from measurements that it is 1/2 inch and 28 in length. I am struggling with the correct shoe and and top. Can you advise please. I live in the central valley of California and my house was built in 1994 with black frame dual pane windows. We just had a energy efficiency test and the inspector told us that our windows are in good with energy efficiency but as you can see from my pictures the channel balances have seen better days. Thank you in advance.
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Casey from SWISCO responded:

Hello,

Take a look and compare our S350-28 channel balance to yours. There should be a stamp code on your metal channel that you'll use to choose the corresponding strength option for your new balances. Thank you! 

S350-28 : 28
28" Series 350 Channel Balance
S350-28
$10.25
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