... in core.Model A: pre-painted steel sheet as outside cover, galvanized steel sheet as inside cover, with EPS in core. Common panel ... Common thickness 30mm,40mm,Model D: Aluminum sheet as outside cover, galvanized steel sheet as inside cover,with EPS foam and/or plywood in ... panel thickness 30mm,40mm,Model E: Aluminum sheet as outside cover, plywood as inside cover, with EPS foam in core.Common panel ...