... quality galvalume steel as the substrates. The surface is coated with 7-layer protective ingredients of AL-Zin, macromolecule resin, ... corrosion resistance, ageing resistance,and long service year. 7. Safe: With the unique water proof, wind proof, the nailed installation design ... or ceramic tile;Easily cut, bent and shaped, quipped with matched accessories,together to make convenient, handy, easy work ...