The aeroponic General Hydroponics® AeroFlo generates a fine nutrient solution mist to maximize oxygen to the root zone and provide ideal growing conditions. Roots grow in the moist air space between the net cups and hang in a shallow, constantly circulating bath of super-oxygenated nutrient solution. By controlling the depth of nutrient solution in the growing chamber, gardeners can maximize moisture supplied to seedlings and cuttings and increase aeration to the roots of mature plants. Measures 4 feet 2 inches by 4 feet 7 inches. The 36-site unit comes with six 4-foot grow chambers, thirty six 3-inch net cups, a 40-gallon reservoir, WaterPOWER 120 pump, sawhorse, Coco Cups, clay pebbles and three-part Flora Kit. THIS INCLUDES PART 1 OF 2 ONLY (CHAMBERS). BOTH PARTS ARE REQUIRED FOR A COMPLETE WORKING SYSTEM.