... performance but low price 3.Different surface treatment 4.ISO9001,ISO14000 certification. Aluminum heat sink use way ... treatment:T5,T6 etc. 3.Processing:Extrution,cutting,CNC(Milling),Anodizing. 4.Surface treatment: including cutting, milling, turning, drilling ... , tapping, stamping and anodizing, CNC, etc.Remark:The ...