MarsLG Hydroponic Mylar Grow Tent 3'x3' Non-Toxic Hydro Cabinet,MARS363678 Easy, tool-free assembly.Vent duct holes Removable, water-resistant floor tray in case of spillage Ventilation windows,Tough, black-colored polyester canvas outer shell Metal grid in ceiling for hanging lights and other accessories Sturdy metal frame structure, with nylon push-lock corners