HENGZE Hot Sales Prime Quality PPGI Corrugated Metal Roofing Sheet With Any Colour is a pressure-coated board which adopts color-coated steel sheet and is cold-rolled into various wave types by rolling, and the types according to the substrate are as follows:HENGZE 2018 Hot Sales PPGI Steel Roofing Sheet and 55% aluminum color-coated aluminum-zinc corrugated steel sheet .