... sandwitch:40-300mm Width:wall board:1200,1150,1000,950mm roofing board:950m Specificationswe mainly supply GI,GL,PPGI,PPGL,CORRAGATED ... to customers' requirements Width:wall board:1200,1150,1000,950mm roofing board:950mm Heat insulation and preservation.Thermal conductivity: 0.035W ...