... :1000 pcs ISO 9001:2008 Prompt delivery best price Aluminum cooling fin ,CPU heatsink ,radiator, CNC machining , CNC turning , CNC millingProduction ... (Payment Terms/Shipment Terms/Lead time):TypePrecision CNC machining partMaterials:Aluminum alloy, stainless steel , brassMaterial GradeGB,ASTM,AISI,DIN,BS ... /OD Grinding 0.002Wire-Cutting 0.002 Machining part aluminum extrusion heatsink for cooling