... quality for all our aluminum radiators. Sunfar radiators use national standard LD31(6063) aluminum alloy, 10 sets of 800T die-casting ... Metals;4/Unique double-faced design. Main Characteristics 1/ Aluminum Composition: LD316063(Conforms to the national standards GB/T3190 ... ";1/2";1" 0.51870781.8/1.580 High quality aluminum radiator, radiating heating radiator, water radiator, , aluminium radiator, ...