Material: Butraco’s Square corrugated iron is usually made from galvanized steel, color-coated steel or aluminum-zinc alloy (AZ) coated steel, ensuring the high durability and good corrosion resistance for products. Anti-corrosion properties: Thanks to the zinc or alloy coating, Butraco’s corrugated iron is resistant to bad weather effects, especially in hot and humid climates with h... http://butraco.vn