1.cast iron radiator 2.working pressure up to 1.0Mpa 3.long using life 4.reasonable price 5.anti-corrosion,smooth surface 1.Be made of the mild steel. Tow rows of 50mm×25mm flat tubes and tow round tube tubes1 1/2 are sealed to make up the Southern series radiator.2.The center distance is changeable from 300mm to 1800mm.3.The big caliber (50mm×25mm) makes the water flows expedite to heat ...