... 3. Reply Email in 4 hours 4. UL,SGS,ROHS printed circuit board PCB&PCBA manufacturer:We can offer 1 to 12 Layer PCB fabrication, PCB ... of ZLX technology: 1layer1-12 layer2MaterialFR-1,FR-2,FR-4,CEM-1,CEM-3,Hight TG,FR4 Halogen Free,3Board ... ,Immersion gold Inmersion Silver/Gold,Osp,Gold Plating9Copper thickness0.5-4.0oz10Solder mask colorgreen/black/white/red/blue/yellow11Inner packingVacuum packing ...