... operation The five biggest manufacturer of compact solar stock tank heater with CE,CCC,Solarkeymark 1.Products series ModelCapacity(L ... with high temperature originates from Germany Bayer Company,whose inner tank,outer skin,end cap and insulation layer form a ... thickness color steel/ fluorine carbon steel/sus210,360mmMaterial of inner tankFood grade 0.31-0.5mm thickness SUS304 stainless steel ...