... :2 4.Finished:HASL led pcb board : 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 ... ,ROHS,ISO9001,T/S 16949ASSEMBLY:LEDA FREE,NOT LEAD FREE led pcb board