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1. Electric galvanized
Electric Galvanized: Surface smooth, bright, zinc coating: 20-30g/ m2. In the humid environment, it is easy rust, But after the rust does not affect use, life span:8-10 years)
2. Hot Dip Galvanized
Hot Dip Galvanized: surface zinc is thick, can reach about 500g/m2, It has the corrosion resistance of high strength. the surface have zinc knot, not smooth, life span: 25 years
3. Electric galvanized + PVC
PVC Coated: Surface smooth, and bright, the inner wire can be black wire and electric galvanized wire. life span:20 years