For the rak wireless I’m using this one
For the 8dbi it came with one, make sure you pay attention to your antennas connector. They were different on both.
Edit: it don’t matter a whole lot which brand you go with but make sure it will fit your connection type (male or female)
>810.21
since you bring up 810.21 he can round ground wire to the mast and bond that and run to a ground rod.
However in 810.21 it says to ground the cable going inside. I'm not sure how to actualy *do that* compliantly with an ethernet cable. (I have devices for doing that with coax but ive never seen them for CAT 5/6). I suppose they must exist? I wonder if they're compatable with POE. For instance this is one for coax:
https://www.amazon.com/Proxicast-Coaxial-Lightning-Arrester-N-Female/dp/B01E2URC8G