channel balance replacement

A home owner from Irvine, CA says:
Channel balance is non-tilting, 1/2 inch wide, 31 inches long. See photos.
Thumbnail of the uploaded file named plastic piece on end 2.jpg
Thumbnail of the uploaded file named plastic piece on end 1.jpg
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Casey from SWISCO responded:

Thank you for your inquiry. Have a look at our S385-31 channel balance. This has a 19-005 balance top and 15-004 bottom balance shoe. You will need to compare your nylon fittings to ours to ensure this is the correct replacement. I wasn't able to see your full stamping in your photos. Could you send us another photo showing the complete stamp? That would be much appreciated. 

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