... manufacturer of 58*1800 solar bolier,solar water heater with CE,Solar Keymark,CCC 1.Products series ModelCapacity(L ... 35-0.7mm thickness color steel/ fluorine carbon steel/sus210,360mmMaterial of inner tankFood grade 0 ... port, overflow, water inlet and outlet, electric heater is optionWelding:Argon arc weldingFastening pieces:stainless steel ... 1800 solar bolier,solar water heater with CE,Solar Keymark,CCC