... delivery 2.NO MOQ 3.Free sample before production 4.One-stop-service black solder mask PCBWe can provide ... -5oz(17µm-175µm)8. Surface Finishing: HASL, Lead free HASL, ENIG, Immersion Tin, Immersion Silver, Immersion gold, ... TNT (door to door) layers2materialFR4solder maskblackcopper1ozboard thickness1.6mmfinishinglead free HALmin trace0.1mmmin space0.1mmcertificateUL, ISO, RoHS black solder mask PCB