I need replacement parts - all of the plastic thingees

A quick learner from San Diego, CA says:
I have more pictures if needed.
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A quick learner from San Diego, CA says:
The metal channel is 36 inches long. I am attaching a photo that shows the label on the inside of the channel.
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A quick learner from San Diego, CA says:
The channel is stamped 3530. See additional picture...
Also, the cord is broken on one of the channels. I need to re-string it. Do you sell the cord? The window has one of these channels on either side.
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Lauren from SWISCO responded:

Hello, thank you for posting,

With this combination of attachments, you could have either an S380 or S385 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment.

You will need a 36" balance with a 3530 stamp option. The cords are not sold separately. The full balance will need to be replaced. Please review and let us know if you have any additional questions. 

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.

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