... : 1, KB base material 2,lead free HASL, 35um,2-layers 3.free sample 4.best price and high quality Grandwork is professional ... PCB, DVD PCB and power supply PCB. We choose the best base material suppliers as our partners, such as KB and ... laminate, Metal core AluminumSurface Finish:Hot air Lev p lead free HASL, immersion gold/silver/tin, plating gold, OSPBoard Thickness:Inner ...