Rogers RO4350B printed circuit board Layer count: 6 Material: R4350B ,1.6mm, , 1 OZ for all layer Minimum tack: 8mil Minimum space(gap): 8mil Minimum hole: 0.30mm Surface finished: ENIG( Au 2 U") Panel size: 120*113mm/1up Characteristics: Rogers RO4350B multilayer PCB http://www.hiquality-pcb.com/Pro/pro_show/pid/134.html