... , polished and mill finish etc. welded. Aluminium heat sinks/exchanger 1, Material: 6 series alloy 2, Size: all sections satisfied, max ... width:700mm 3, Temper: T5, T6 4, Surface treatment: mill finish, polished, ... : Heat sinks/exchanger, decoration, electronic equipment frame, power wind etc for industrial use. extrusion aluminium heat sink for LED