"Storage tents are all made of modular system, it can be extended by 5m bay without limit in length, frame made out of reinforced aluminium alloy 6061/T6, fabric made out of double coated pvc, flame resistance is based on DIN 4102 B1, M2 standard. Accessories available: -sidewalls(pvc sidewall, steel wall, sandwich wall, ABS wall) -ground anchors -weight plate, -glass wall system -door system(rolling shutter door, industrial sliding door) -flooring system -rain gutters system Big Storage Tent http://www.chinabigtent.com/"