Designed for Wall , Flat or outdoor Rooftop Pitched Mounting most DirecTV, DISH Network Satellite Dishes , medium sized Off-Air Antenna & WIFI Antennas. J Pipe is 23 inch long with a standard 18" Bend & the 1.5" O.D. J Tube comes with a crimped collar to slip a standard 1 1/4" mast Pipe , the upper collar with wing nuts tightens mast pipe slipped into J Pipe to extend the length up to a recommended max of 8 ft of mast pipe Zinc Coated for Maximum Weather Protection
Dishes larger and up to 39 inches in Diameter or width would require substantial bracing or additional bracketing to withstand the windload created by such large antenna and still keep aim.