... Double-sided PCB; 2) Copper: 1 OZ; 3) Soldermask: Black Printed Circuit Board (PCB) Manufacturing Capabilities MaterialConstruction TechnologySingle-sided PCB ... Lead-free HASLSolder MaskSolder Mask ColorRed, Green(Matte-Green), Blue,Black(Matte-Black), White, YellowSolder Mask Thickness10 ~ 25um ( 0.394mil ~ ... PCB Quality Assurance Aluminum substrate PCB Double-sided black color Aluminium Core PCB