If you want to bury your outdoor Deck Post into the ground and use concrete,this is what you need. SkyVue offers an all weather special powder coated aluminum 2 piece 4" round heavy wall In Ground Post that is overall 108" long. The 2 piece post is designed so the lower tube goes in ground, and the longer upper tube fits over the lower tube and swivels left or right. The lower tube adds 30" of overall length, and the upper tube adds 78" of overall length. This In Ground Post is designed with rear facing holes to run cabling down the inside the round tube so not to be seen, and incorporates an all weather molded resin cap on top making this unit attractive in your space. You decide how deep to bury your SkyVue In Ground Post in the concrete, based on your specific geographic location and frost line conditions. This In Ground Post comes standard with our Heavy Duty TM-55 (300 lb capacity) Outdoor Tilt Mount. The new SkyVue In-ground Post is able to swivel a full 360 degrees for optimum viewing angles. This model IGP-55 is designed for big 55" All-Weather SkyVue NXG, NXG DS-500, and NXG DS-700 Series HD LED Outdoor TV.