FR-4 PCB board 1.High quality, low cost & fast delivery 2.NO MOQ PCB board 3.Free sample before production 4. ... Material ( RoHS Compliants) Item Mass ProductionPilot Run ProductionCapacityCapacity Layer Counts1L—18L, HDI20-28 , HDI MaterialCEM-1,CEM-3,FR-4, High TG FR-4 , Halogen-free FR-4 ... Position/hole Tolerance ±0.05mm PTH:±0.076MM NPTH:±0.05mmMini hole ring (single 0.075MM0.05MMOuterLayer Copper ...