Heavy copper printed circuit board, 4 OZ circuits board, 4 OZ printed circuits, 4 OZ PCB, planar winding PCB Material: FR4,1.6mm, 3 OZ for all layer Minimum tack: 10mil Minimum space(gap): 12mil Minimum hole: 0.30mm Surface finished: ENIG( Au 2 U") Panel size: 70*60mm/1up Characteristics: planar winding PCB,heavy copper http://www.hiquality-pcb.com