1.1-16 layers, FR4, Au. 2.Short Lead Lime. 3.UL,RoHS,SGS, ISO9001:2000 4.11 years ... experience. PCB Boards Capability Material: FR4, High TG FR4,Halogen Free material,CEM-3, Rogers HF material, etc. Layer counts: 1 ... Legend/Silkscreen Color: white, yellow, black, etc. Surface Treatment: HAL, Lead Free HAL, Immersion gold, OSP, Immersion tin, Immersion silver, etc. Other ...