2002 Insualte vinyl single hung balance

A quick learner from Hawaii says:
1/2 wide, 26 long, which should I order?
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Bob from SWISCO responded:

See our S380-26 or S385-26 Channel Balance. The only difference between these two balances is the depth of the bottom nylon shoe, as shown below. Compare both with your old hardware and see what matches best. For a stamp option choose 2530. 

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.
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