... .UL,SGS Test,RoHS and ISO9001:2008 2.1-16 layer,FR-4,Alu 3. immersion gold, HASL, OSP 4.Single ... side LED PCB, OSP finish FR-4 Single Layer PCB with HASL Finish Sampling based on customized gerber or original sample ... , it would be our pleasure to begin a business relationship with you and supply your company our quality products. Many thanks ...