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