Window balance broken

A friend from Raleigh says:
Dear Sir or Madam,

some of my frinds window balancers are broken.
Could you please help to identify which replacement balancer works? The size looks like 9/16 x 1 1/4. On the coils, one is marked "5", the other "6". The weight of the window is 20 - 23 pound. The height is 36 ".
Thanks,
Andreas
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Emily from SWISCO responded:

Hi, Andreas.

Thank you for reaching out to us. Our 15-180 pivot shoe looks like a match for what you're looking for. We also sell the 15-182 bushing and 15-181 double support clip. Take a look at the specifications for these parts and let us know if you have any questions. 

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