... .We are a high-tech enterprise which specializes in developing, manufacturing and marketing pcb.1.Our product ... , double-sided, multi-layer, high frequency, MCPCB, metal-backed PCB,etc.2.Product qualityOur product got ISO9001, ... Min. Hole Diameter for Punching0.9mm(35mil)Max. Fabrication Area610mm×508mm (25 inch×21 inch)ConductorWidth(W)+/-0 ... Control+/-10%Different Impedance+-/10% PCB manufature in China