... 3.ISO9001:2008 Certification 4.OEM service available Specification:1. Aluminum Extrusion Heatsink2. Other available processes: sand casting, investment casting, die ... CNC machining3. Available materials: cast iron, carbon steel, stainless steel, aluminum, brass, and zinc alloy4. Surface treatment: painting, epoxy powder coating ... as per customer's detailed requirement 160*120*40mm aluminum heatsink