1.1-16 layers, FR4, Au. 2.Short Lead Lime. 3.UL,RoHS,SGS, ISO9001:2000 4.Approved HASL PCB; PCB Boards Capability Material ... : FR4, High TG FR4,Halogen Free material,CEM-3, Rogers HF material, etc. Layer counts: 1-16 layers ... , etc. Wrap and twist: ≤0.7% Flammability: 94V-0 2 Layers PCB Boards