... steel co.,ltd ,a professional manufacture for PPGI,GI,corrugated steel sheet and EPS sandwich panels sincere 1993 with a ... great reputation. Both side metal specification: steel sheet bending width1000mm/1200mmcolorRAL No.the coating ... orderminimum order50tonstandardGB/T,ASTM,JIS &its equivalent the both metal meterialInner Material the sandwich panel thickness50,75,100,150, ...