... about the led aluminum base pcb: 1.FR4,double-sided pcb,1.0mm,1OZ,Lead Free 2.17 years experience in PCB,s ... 0.43°C/W19breaddown Voltage2KCdc-6KVdc20Production Timesample 3-5 days,Large 5-7 days21Inspection StandardsApply with MIL-SLD-105 II, ... 022Quality StandardsNational andards:GB5488.2-88 Metal-based holeDouble-sided PCB technical conditions International Standard:IPC-A-600EEnterprise Standard:APC- ...