Thank you for the photos!
From what I'm seeing it looks like you need the Replacement Lift Arm # FVK8011-05 and the Replacement Dome # FVK1020-19 for your main vent. The dome should be an exact replacement while the lift arm doesn't have the same bend that your current one does, but the attachment point to the roof vent is on the opposite side yours is so it will match up just fine.
When it comes to your exhaust vent I recommend replacing it with the Valterra RV Plumbing Roof Vent with... view full answer...
Yes, the Electric Trailer Brake Kit # AKEBRK-35-SA has 10" x 2-1/14" brake assemblies that will work great with your 2018 T@B 320S trailer!
If you're also needing to replace the mounting hardware then you can get that with the kit # BRKH10B as well.
Attached are installation and review videos for you to check out. view full answer...
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