... Test, RoHS Certification 3. 1-20 layer : FR-4 matirial Timer pcb pcba1. Good Quality: UL, SGS Test, RoHS Certification2. ... prototype runs Large scale production runs ENIG, Immersion Silver, Lead Free HASL Edge plating, plated slots Blind / Buried vias Fast ... CNC: ±0.125mm, Punching: ±0.15mmSurface finish/treatmentHASL/HASL lead free , Immersion GoldCertificate ROHS, ISO9001:2008, SGS, UL certificate.