... 3.ISO9001:2008 Certification 4.OEM service available Specification:1. Aluminum Extrusion Heatsink2. Other available processes: sand casting, investment casting, ... CNC machining3. Available materials: cast iron, carbon steel, stainless steel, aluminum, brass, and zinc alloy4. Surface treatment: painting, epoxy powder ... production as per customer's detailed requirement 200*80*85.5 mm aluminum heat sink