Size: 48"Lx48"Wx78"H * Do NOT have any PVC materials, which is known to release a chlorine based toxic gas that may harm the plants * Powder coated anti-rust metal frame; Thick 5/8" top cross hang bars for heavy grow lights. * Ventilation: One 6" round, two 3.5" round, three 15"x2.5" rectangular * One inside thermometer pouch and one bottom tray