Need Help to ID Channel Balance Parts

A quick learner from California says:
The attached photos indicate the type of parts that I need help to ID. The channel is 1/2" and length is 29". I reviewed the channel guide but can't seem to find a match. Please help.
A quick learner from California says:
...and the number is 2830 BST P.
Profile picture of Tom
Tom from SWISCO responded:

Our S395-29 looks just like this, and it's offered as a "2830" option. Sounds perfect!

A quick learner from California says:
Nice! Thank you for your help. Made it easy.
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