... 4 size and color optional Our advantage:good quality,high technology,fine management ItemCNC processing mechanical shell Material ... etc Making process Laser cutting,CNC Punching,CNC Bending,Tig Welding,Mig welding,Riveting,Grinding,Stamping,Assembing,etc Surface treatment ... Milling machines,Grinding machines,Oil hydrulic press Service type OEM ODM file formats Pro/engineer,Solid works,Auto CAD ...