The metal installed via the antenna pole is galvanized steel, which has anti -rust coating to prevent rust and corrosion for outside installation. This is terribly heavy. The rod installation bracket fabricated from 0.2 -inch thick galvanized steel is powerful adequate to hold heavy antennas. This antenna rod is straightforward to install, and makes use of a V JAW block with dual U -shaped bolts to that the pole doesn't slide down. The rod set up seat can be used for fixed rods, with a diameter vary of 1.1 to 1.97 inches (30-50mm). It is widely used for exterior antennas racks, can be used for building roofs or walls, and is acceptable for antennas. Color: Silver Material: steel Package Contents: 1 x Antenna Pole Mount Kits Only the above package content, different products usually are not included. Note: Light reflection and different reveals may cause the color of the item within the photo a bit of different from the real thing. The measurement allowed error is +/- 1-3cm.