... and high quality secondary gl.Secondary GLsecondary glGalvalume zinc aluminized sheet coil/ galvalume steel coilGalvalume CoilStandardGB/T14978, ASTM A792M, ... -processingChromated, Anti-finger printed,Oiled, etcBasic Information:Al-Zinc Steel Coil surface is smooth, flat and magnificent star flowers, ... from 55% of the aluminum and 43.4% of zinc, 1.6% of silicon composition.Features:Heat reflection, ...