28b window balance

A contractor from Glendale, NY says:
May 23, 2021
Hello,

I'm interested in purchasing new window balances as pictured, they measure approximately 28 1/2 inches and are attached with a single screw at the top.

Thank your,

Vince
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Bob from SWISCO responded:
May 26, 2021

Hi Vince. I believe this might be our S770-28, but go over all the specifications to confirm. Please be certain on the exact length--it should be 28". Many thanks. 
28" Series 770 Balance
28" Series 770 Balance
S770-28
$12.70
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