This adjustable non-penetrating roof mount is designed for the slim line and the international dish The mast is reversable for easier installation with a 1 3/4 OD on one end and a 2 OD on the opposite end the installer simply selects the diameter when assembling the frame No holes need to be drilled in the roof surface this avoids reluctance by building owners and reduces the possibly of roof leaks The total weight of the assembly can be varied by the use of either light concrete blocks or standard weight blocks This and ALL roof mounted antenna assemblies should be tethered to the building with a flexible steel cable for maximum security