Series 385 Channel Balance

A quick learner from Oregon says:
Hello,
Please confirm 385 is the correct channel.
Does the strength stamp shown in photo mean 2640?
Thank you for your help.
Thumbnail of the uploaded file named IMG_20190312_141714_1.jpg
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Bob from SWISCO responded:

Thanks for posting. Yes, well done: this looks like an S385-27 with a stamp option of 2640. You just may want to confirm the metal channel, not including the end attachments, is 27" just to be safe.

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