--Solar water heater controller/control board/pcba/pcb assembly --PCB prototype/PCB mass production ... mil)Solder mask ColorGreen , Red , Blue , Black , WhitePanel Outline Tol (+/-)CNC: ±0.125mm, Punching: ±0.15mmSurface finish/treatmentHASL/HASL lead free ... GoldCertificate ROHS, ISO9001:2008, SGS, UL certificate Solar water heater controller/control board/pcba/pcb assembly