... Chrome, Tin, Ag); Painting, Powder, Anodizing, E-coating, Silkscreen, Heat treatment, Black oxid; 3) producing scope: cnc ,Laser cutting ,metal ... fabricating;3) RoHS compliance for export4) Quality assurance in accordance with ISO9001:20085) Concurrent engineering capability on product design6) Just- ... packaging method according to customer's requirement sheet metal heat sink with black powder coated