Greenhouse COMFORT PROF, 4x12 m (13.1x39.4 ft), 6 mm PolycarbonateSize: 4x12 m (13. 12x39. 4 ft) Height: 2. 3 m (7. 55 ft) Floor area: 48 m2 (516. 67 ft2) Polycarbonate thickness: 6 mm Carcass: galvanized steel 40x20 mm & 20x20 mm Arc distance: 1 m (3. 28 ft) Windows: 2 pcs Doors: 2 pcs Snow load: 100 kg m2 Protection against rust The frame of the greenhouse is made from a closed galvanized 40x20 mm and 20x20 mm tube. The use of this kind of profile allows improving the durability of the construction significantly.