ROHN URM Roof Mount Bracket with Swivel Base for Telescopic Antenna Mast Pole Made in the USA! Capable of supporting most TVRO, PCS, Cellular, and Microwave antennas. The Universal Roof Mount adapts to various roof pitches and the fully adjustable realeg allows for use on a flat or up to a 12"/12" pitched roof. Installation is easy because of the quick adaptability, plus there's no need for concrete block. This Non-Penetrating roof mount is Hot Dip Galvanized after fabrication, and can easily ship UPS.
Optional Pipe for Antenna Placement on Mount - Ordered Separately P2530 2-1/2" (2-7/8" OD) x 30" Long P330 3" (3-1/2" OD) x 30" Long P3530 3-1/2" (4" OD) x 30" Long P430 4" (4-1/2" OD) x 30" Long
Note: You need to Consult an Engineer to determine the Load Bearing Capability of the roof that you are entertaining such an Installation. Please refer to the Chart (pdf link above) which is a great place to start in determining whether your circumstances qualify for such an installation.