Smials is a 7.5-foot ultra-high outdoor greenhouse: you can freely enter the large greenhouse without having to lower your head, and the arched tunnel shape encloses a large space for convenient planting and management of various plants. It adopts hot-dip galvanized steel frame, which is more corrosion-resistant and rust-proof. Pipes with a wall thickness of 6 mm and a diameter of 25 mm, 7 rows of cross bars, and 4 additional cable-stayed tubes make the overall frame stronger, and the cross bars can also hang plants.