1. 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

2 .The height can be adjustable, also meet the needs of different clients personalized

3 .As the span quantity is for you optional, it can suitable for big area planting

4. Usually used to grow vegetables, like tomato, cucumber, chili etc, also grow cut flowers

5 .All structure built by hot galvanized steel pipe, anti-rust for 10~15 years

6. All connectors are jointed by bolt,nut and washer and so on. No welding is required.

7.Covered by 3-ply (PE+EVA Material) poly film (plastic film), Anti-UV, Anti-Drip130micron/150micron/180micron/200 micron thickness for your choice