26 Sq.m Durable All-Weather Professional Poly-carbonate Greenhouses with ETFE Roof. Constructed from galvanized steel profiles with hidden connectors. Structure reinforced with steel cables.Wind Resistant up to 150km/h , 42 m/s. Snow Load 200 kg/square meter. Hail Tolerant.Single and Double Roof available. Must be bolted to a concrete foundation.Comes with construction manual and growing guides.Positive Pressure Entrance.Mobile Shade Cloth. Full-Length Mechanical Window. A designated location for intake and exhaust fans. " Reasonable Use " 10-year Limited Warranty Customization available for large orders