... 0.6mm Solder mask color: green, black, blue, white, yellow, and matt, etc. Solder mask hardness: ... 6H Legend/Silkscreen Color: white, yellow, black, etc. Surface Treatment: HAL, Lead ... etc. Other Technology: Gold finger, peelable mask, Non-across blind/buried vias, characteristic impedance control, Rigid- ... twist: ≤0.7% Flammability: 94V-0 PCB for Electronic LED Products