4-Layer pcb 1. One-stop pcba service 2. Fast delivery with high quality 3. Reply Email in 4 hours 4. UL,ROHS,SGS, ... ISO9001 4-Layer pcbPCB&PCBA manufacturer:We can offer 1 to 12 Layer PCB fabrication, PCB design, PCB layout, PCB manufacturing, PCB ... Function Test, design solution.PCB Specification of ZLX technology: 1layer1-12 layer2MaterialFR-1,FR-2,FR-4,CEM-1,CEM-3,Hight ...