... Material: FR4, High TG FR4,Halogen Free material,CEM-3, Rogers HF material, etc. Layer counts: 1-16 ... 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 Free HAL, ... ≤0.7% Flammability: 94V-0 PCB for Electronic LED Products