Galvalume steel coil is also the best material steel for roof,door and other building.the most time Al 55%. alu-zinc galvalume steel coilmaterial: SPCC,SGCC ... ,CGCC,SPGL aluzinc:30g--150g AL55% thickness:0.20-1.20mm width:1000,1200mmhot dipped zincalume steel ... .6%thickness:0.20-1.20mmwidth:1000mm,1200mm,1250mm,etc Galvalume steel coil