"This small green house is a great way to protect your plants from frost and other harmful weather. The crystal-clear polycarbonate SnapGlas roof panels are held in place by an easy-to-assemble frame, which in turn is held down by a number of ground spikes. Outer Material Polycarbonate, Dimensions L x W ft. 3 2/5 x 1 4/5, Ventilation Hinged door, Center Height in. 18, Width in. 22, Style Single cold frame, Frame Type Corrosion-resistant aluminum, rigid polypropylene frame, Color Clear, Length in. 41."