Anderson Window Balances

A quick learner from Berlin, MD says:
Hi. I need to replace some window balances on my Anderson windows. House was built in 2005. Not sure which replacement I need. I removed one of the balances. The only numbers stamped on the balance are 11600-17 stamped on the window side of the box and 11600-A3 stamped on the jamb liner side of the box. On the flap used to attach the balance to the jamb are stamped 11R and 493 01/06. No other numbers corresponding to the numbers on your website are on the box. What replacement balances do I need? Thanks.
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Donna from SWISCO responded:
Thanks for posting! This is actually a new balance that we are currently bringing in. However, it is not yet online. I will post again as soon as it is available for you to view.
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Donna from SWISCO responded:
Please see new SWISCO product code 24-11R, Andersen Balancer Box.
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