... .6MM 2.Colour:black 3.layer:2 4.Finished:HASL prototype pcb : ITEMS:SPECIFICATIONLAYER:2 -10layerBOARD MATERIAL:FR-4, CEM-1,CEM ... -3, High TG, FR4 Halogen Free,FR-1,FR-2 BOARD THICKNESS:0.6-3.2mmCAMBER:D>5.0+/-0.076mm ... ,ROHS,ISO9001,T/S 16949ASSEMBLY:LEDA FREE,NOT LEAD FREE prototype pcb