Greenhouse Walk-in Grow House 34017956Features: Protects crops from cold, frost, and hail in winter and stimulates growth in spring and summer Powder coated, reinforced galvanized steel frame resists water and warping UV blocking PE cover with a reinforcing grid to prevent tearing Four slant bracing tubes, seven reinforcing bars, and front crossbars for enhanced stability Eight net protected roll up side windows for cross ventilation and climate control Zippered roll up door that straps