Rogers RO4003 printed circuit board, multilayer pcb Layer count: 4 Material: RO40003 ,1.63mm, , 1 OZ for all layer Minimum tack: 8mil Minimum space(gap): 8mil Minimum hole: 0.30mm Surface finished: hot air level Panel size: 120*63mm/4up Characteristics: Rogers multilayer PCB http://hiquality-pcb.com