The General Hydroponics® AeroFlo comes complete with everything needed to get started and offers a very fast growth rate. By generating a fine mist of nutrient, aeroponic culture maximizes oxygen to the roots of plants and provides ideal conditions for all stages of growth. 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 1.5 feet by 7 feet. The 20-site unit comes with two 6-foot grow chambers, twenty 3-inch net cups, an 8-gallon reservoir, Mag Drive #3 pump, sawhorse, PolyWool, grow rocks and three-part Flora kit. THIS INCLUDES PART 1 OF 2 ONLY (CHAMBERS). BOTH PARTS ARE REQUIRED FOR A COMPLETE WORKING SYSTEM.