This extruded heat sinks size is 320*280*50 mm, we have 30,000+ sets standard extruded heat sinks' s molds in stock for your option, we can provide samples with differernt sizes are availabe for prototypes test, so can saving your R&D cost and mold cost. Also we can provide custom extruded heat sinks  design and manufacturing with more than 10 years professional manufacturing experience in this field . Our company have more than 20 times aspect ratio heat sink can be extruded by 800 tons--5000 tons extruding machine by most advanced technology. Ultra wide extruded heat sinks can be made by our unique friction welding technology. The production process for the extruded heat sinks  are profiles extrusion, cutting, CNC Machining(milling, drilling,tapping), deburring, cleaning, inspecting, packing.