air cooler for cold room fin distance:4.5mm,6mm,9mm galvanized steel blue hydrophilic fin axial rotor fan motor cold room evaporatorfin distance:4.5mm,6mm,9mmgalvanized steelblue hydrophilic finaxial rotor fan motor refrigeration evaporator:BFT refrigeration evaporator series is suitable for high,middle,low temprature(+10°C— -25°C)1.light in weight,convenient intallation,compact structure,Rapid ...