... .UL,RoHS,SGS, ISO9001:2000 4.Approved HASL PCB; PCB Boards Capability Material: FR4, High TG FR4,Halogen Free material,CEM ... gold, OSP, Immersion tin, Immersion silver, etc. Other Technology: Gold finger, peelable mask, Non-across blind/buried vias, characteristic impedance control ... . Wrap and twist: ≤0.7% Flammability: 94V-0 Bare PCB Boards in Panel