... extrusion heatsink SGS audited China supplier of aluminium extruded heatsink for auto engineOEM aluminium heatsinkextrusion ... heatsinkSGS certified 1)Aluminium extrusion heatsinks/radiators for industrial enclosures/chassis/case2)Aluminum 6063 extrusion ... blasting; powder coating, milling; polishing,anodizing15)Surface colors for aluminium extrusion heatsinks/radiators: natrual, green, red, yellow ...