Brief description about the led aluminum base pcb: 1.FR4,double-sided pcb,1. ... PCB,s Processing Capability Of StandardNO.ITEMTechnique Data1Product TypeAluminum base,Double-sided aluminum base2SubstrateDomestic aluminum plate,TAIWAN Domestic ... %~50%Sales Market (Overseas, Domestic)North America,Europe,Asia,Middle East,Taiwan,Hongkong,DomesticISO CertificationISO9001:2008Other CertificatiesUL=E248209, ...