Hydroponics Mylar Grow Room Non-Toxic Hydro Cabinet Tent 4'x8' GYO1004 Non-Toxic mylar interior lining Assembled size: 240cm x 120cm x 200cm (96" x 48" x 78") Composite Canvas/Mylar shell: .55mm (.022") 6" vent duct holes (3 total) Mesh ventilation windows