29" x 7/16" Galvanized channel balance

A quick learner says:
The stamp shows 28C a.
I will need 3 of these. The above link shows a photo of one similar.

I am hoping you have one that will work. I need to order 3 balances. The attached photo shows the width is 14/32". The length of the channel without th plastic end hardware is 29".
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Casey from SWISCO responded:

Hello,

At first glance, your channel balance reminds me of the S800-29 but you would need to confirm that the 3/8" width of the metal channel matches your assembly. If so, you would also need a 28C strength option to support a sash between 14-20 lbs. Take a look and thanks for posting! 

Close up view of the S800 balance top.
Close up view of the S800 balance top.

Close up view of the S800 balance shoe.
Close up view of the S800 balance shoe.

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