... , Best price 4, Quick delivery 5, Considerate service Four-Layer PCB of High Quality Board Material: imported from Taiwan, made-in-china, NEC ... ---1.2mm:400*350mmD, Board thickness0.4mm:350*300mmE, Single-sided board:606*530mm(board thickness>1.2mm)F, Six layer pcb:430*430mmG, Eight layers ... . production workshop with high-tech equipments We are a professional PCB manufacturer! four-layer pcb board