Non-Penetrating Roof Mount with 1.66" x 30" Mast - EZ NP-30-166 Flat Roof Mount NON-PENETRATING ROOF MOUNT FOR SATELLITE DISHES, WIRELESS INTERNET ANTENNAS, ETC USES STANDARD CONCRETE BLOCKS TO ANCHOR TO ROOF STEEL CONSTRUCTION. 35" X 28" BASE FEATURES 1.66" X 30" X 18 GAUGE GALVANIZED MAST Made in the USA