Roof Vent, which is fixed, can be good ventilation on the top, especially suitable for hot areas, like Africa, Middle-Ease, South-East Asia, South-America and so on
As the span quantity is for you optional, it can suitable for big area planting
Usually used to grow vegetables, like tomato, cucumber, chili etc, also grow cut flowers
All structure built by hot galvanized steel pipe, anti-rust for 10~15 years
Covered by 3-ply (PE+EVA Material) poly film (plastic film), Anti-UV, Anti-Drip130micron/150micron/180micron/200 micron thickness for your choice
All connectors are jointed by bolt、nut and washer and so on. No welding is required
Website:http://www.cnlongyoung.com