... LED floodlight Street light Aluminum Extrusion Heatsink Profiles , 300*136.5mm Meterial:AL 6063 6061/T5/T6 availablesize: 300*136.5mm1 Process ... machining,polishing2 Surface finish for heat sink:clear anodizing, oxidation process, powder coating, brushing, sandblasting,shot blasting,polishing,milling3 Surface colors ...