Awesome!
Great question! The pole mount will fit outer diameters from 1.25" (32mm) to 1.315" (33.4mm). Most commonly this is what they call “one inch” pipe in the US. But, note, “one inch” pip does not actually have an outer diameter of 1.0 inch because the name is based on the inner diameter of “schedule 40” pipe (sort of, schedule 40 is actually around 1.05").
Anyway, if you go to your local DIY store and ask for “one inch pipe” that’s what you want!
More mounting and installing tips are here: https://help.weatherflow.com/hc/en-us/articles/115005229767-Siting-Installation-for-Tempest
And be sure to check out these simple installation examples: https://help.weatherflow.com/hc/en-us/articles/360047672153
Absolutely !