The metal installed by the antenna pole is galvanized steel, which has anti -rust coating to prevent rust and corrosion for outdoor installation. This is very heavy.The rod installation bracket made of 0.2 -inch thick galvanized steel is strong enough to carry heavy antennas.This antenna rod is easy to install, and uses a V JAW block with dual U -shaped bolts to ensure that the pole does not slide down.The rod installation seat can be used for fixed rods, with a diameter range of 1.1 to 1.97 inches (30-50mm).It is widely used for external antennas racks, can be used for building roofs or walls, and is suitable for antennas. Color: SilverMaterial: steel Package Contents:1 x Antenna Pole Mount Kits Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.