... power 1.material:copper,iron,aluminium,copper alloy 2.High shielding effectiveness, high heat dissipatio metal shell for Module power1.material:copper,iron,aluminium,copper ... Aluminium surface : no scratch, without finger mark6.surface treatment:Copper plating,nickel (electro)plating,polishing, sand blast7other requietments are ... conform to ROHS environmental requirements metal shell for power module