General Hydroponics Rapid Rooter Tray, 50 cell tray & plugs General hydroponics rapid rooter tray A special matrix of composted organic material bound together by plant-derived polymers Fortified with general hydroponic micronutrients, optimal air-to-water ratio 50 Cell tray and plugs Measures 19-1/2-inch length by 9-1/2-inch width by 1-1/2-inch height