What material for sky's mast

My PVC pipe filled with sand was too wobbly, so I replaced it with a galvanized steel pipe today. I considered aluminum and steel electrical conduit tubes, black pipe, and copper pipe. I trusted the steel pipe to be hardier in the weather without bending, corroding or oxidizing. I’m told the outer diameter of the pipe or tube should be 31 to 33 mm (1.25-1.31 inches). Hope this is helpful.

Sky mounting pole diameter

What size pipe/pole/mast do I need for my Sky

Installing Sky on rooftop