ADJUSTABLE HEIGHT - You can adjust the outdoor post to a height of 68-inch by assembling only 3 pieces, or a 79-inch tall lamp post by assembling all 4 pieces 9 INCH DIAMETER BASE: The lamp post has a sturdy 9-inch-diameter base and tapers to support a light fixture with a three-inch-diameter fitter mount. EASY ASSEMBLY: This outdoor lamp post can be set up in minutes and comes with all the hardware needed. It has a 9-inch diameter base that can be anchored to any flat surface. Please read the instruction manual fully before installation BUILT TO LAST - This post is constructed with weather resistant and rust-resistant powder coated black cast aluminum. 3-INCH FITTER POST: Complete your outdoor lighting collection by pairing this outdoor lamp pole with a Gama Sonic outdoor solar post light with a 3-inch outside diameter fitter