we can supply America SK1SK2SK4 Here are brief introduction of our company: SuperGalum is the brand name for 55% aluminum-zinc coated steel sheet. SuperGalum is highly heat and corrosion resistant, combining the properties of aluminum which renders increased durability, excellent heat resistance, and formability, and those of zinc which offers high heat resistance and excellent corrosion protection. SuperGalum is three to six times more corrosion resistant than regular