Features: 1. Economical, Low cost, Easy Frame! Easy Assembly & Move! 2. No foundation and welding are required 3. Good for vegetable, tree, mushroom and poultry. Especially for large scale production! 4. All structure by hot galvanized steel pipe, Anti-rust for 10-15 years 5. Covered by 3-ply (PE+EVA Material) poly film (plastic film), Anti-UV, Anti-Drip 130micron/150micron/180micron/200 micron thickness for your choice 6. All connects kits offered. No welding required. Specification: Tunnel Width:6m-10m; Length:Any length, for you option Section:1m,1.5m,2.0m,for you option; Wall Height-1.8m Roof Height:3.5m(it can be adjustable); Optional: Side ventilation system,Cooling system,Shading System,Irrigation System