... PCB; PCB Boards Capability Material: FR4, High TG FR4,Halogen Free material,CEM-3, Rogers HF material, etc. Layer counts: 1 ... /Silkscreen Color: white, yellow, black, etc. Surface Treatment: HAL, Lead Free HAL, Immersion gold, OSP, Immersion tin, Immersion silver, etc. Other ... twist: ≤0.7% Flammability: 94V-0 Bare PCB Boards in Panel