The advantages of this aluminium box are higher strength due to cold working,closer tolerances,and good surface finish .

Cold extrusion is done at room temperature or near room temperature,the advantages of this over hot extrusion are the lack of oxidation .higher strength due to closer tolerances,good surface finish,and fast extrusion speeds if the material is subject to.

Materials that sre commonly cold extruded include:

• lead

• alunimium

• copper

• zirconium

• titanium

• molybdenum

• beryllium

• vanadium

• niobium and steel