Multi Span Greenhouse (CMR5030) Width:6.0m-8.0m*n Length:4.0m*n, Apex Height:2.5m-4.5m Wall Height:1.8m-2.5m Cladding�Poly Film, Pipe Diameter�Φ32,�50*50*1.5 Advantage High quality steel structure and long service life, The frame works structure is assembled by prefabricated parts, All the greenhouses we designed are easy&quick to be installed and dismantled.No welding involved,all connected by clips and clamps,bolts and screw,slot and springs, The most economical greenhouse for large growers, Optional systems are available for agriculture usage greenhouse: Internal shade system or exterior shade system Cooling and heating system Irrigation system Side Ventilation and roof ventilation(with manual or automatic open-close operation control system is optional ) Hydroponic system