1.2 layer MP4 PCB 2.Good Quality: UL,SGS Test,RoHS Certification 3. ... prototype runs Large scale production runs ENIG, Immersion Silver, Lead Free HASL Edge plating, plated slots Blind / Buried vias Fast turn ... (+/-)CNC: ±0.125mm, Punching: ±0.15mmSurface finish/treatmentHASL/HASL lead free , Immersion GoldCertificate ROHS, ISO9001:2008, SGS, UL certificate 2 layer ...