Mounting: SKY should be mounted securely, insulated from any motion and vibration. We recommend using the compression mount, included with your SKY, mounted to a cylindrical mast. The SKY mount is designed to fit a standard “one-inch” nominal pipe (outer diameter = 1.315 inches, or 33.4 mm) as well as a 1.25 inches (32 mm) outer diameter pole, both common at DIY stores around the world.
More detail here: https://help.weatherflow.com/hc/en-us/articles/115005229767-Proper-Siting-Installation