pcb board wireless: 1, KB base material 2,flash gold, 35um,2-layers 3.free sample 4.best price and high quality ... specialized in manufacturing single side PCB, double side PCB, multilayer PCB, especially in aluminum PCB, DVD PCB and power supply PCB. We choose the best ... Aluminum base laminate, Metal core AluminumSurface Finish:Hot air Lev p lead free HASL, immersion gold/silver/tin, plating gold, ...