... factory LED floodlight Street light Aluminum Extrusion Heatsink Profiles , 300*136.5mm Meterial:AL 6063 6061/T5/T6 availablesize: 300 ... *136.5mm1 Process of heat sink:precision cutting, drilling, skiving,deburring, ... drawings. LED floodlight Street light Aluminum Extrusion Heatsink Profiles,300*136.5mm