Base Material: FR-4, CEM-3 Copper Thickness: 18um-105um Board Thickness: 0.2-3.2mm Min. Hole Size: 0.2mm Base ... Material: FR-4, CEM-3 Copper Thickness: 18um-105um Board Thickness: 0.2-3.2mm Min. Hole Size: 0. ... to meet ROHS compliant-FR4 material with 0.2mm-3.2mm boards thickness-Copper weight:0.5OZ, 1OZ, 2OZ ... ISO9001:2008-Markets: Europe, America, Asia lead free printed circuit board fabrication