... not have column housing. Colorful: No need for surface decoration, color galvanized steel coating can maintain a view to 10 ... specifications, such as business type, H-type, corrugated-type and so on, and the brightly-colored, no need for the surface decoration 2. Flexibility ... organic polymer foam material, its structure is a closed-cell type, with good anti-absorbent and anti-water vapor permeability. ...