... Extrusion Heatsink Profiles from dongguan factory LED floodlight Street light Aluminum Extrusion Heatsink Profiles , 300*136. ... soldering,bonding, punching, stamping,milling, CNC machining,polishing2 Surface finish for heat sink:clear anodizing, oxidation process, ... powder coating, brushing, sandblasting,shot blasting,polishing,milling3 Surface colors:natrual ,black,matt black, green,red,yellow, ...