Multi span greenhouse for farm This type is suitable for greenhoue growing starter and economy requirement. 1. Structure: By Hot Galvanized Pipe, Easy Frame! Easy Assemble & Move!----------All connectors offered,No Welding! Arch size can be DN25mm, DN32mm, DN40mm, DN48mm, DN60mm. 2. Covering material: By PE Film 150micron,200micrn or shade net or insect net or opaque cover or Fiberglass/Polycarbonate Sheet. 3. Connect: All connects kits offered. No welding required. 4. Ventilation: Natural Ventilation on two sides, manual/Auto Controlled with Insect net is available. 5. Characters: Economical! Good for vegetable, tree, mushroom and poultry. Especially for large scale production! High mercantile rate of return! 6. Cooling Pad & Fan system optional. 7.Sliding Door on Front 8. Lettuce and other leaves vegetable for growing by hydroponics/irrigation system: