1. Al base material,1 oz copper, board T1.6mm 2. Green ink, Immersion gold 3. Excellent quality with competitive price ... ,FR-4- TG170/TG180, Halogen Free,Rogers,Arlon,Taconic,Isola,PTFE, Bergquist 2). Surface Treatment: HASL,HASL lead free,Flash gold, immersion ... for ten layer or more high pcb at the soonest 2 Layer 1.6mm aluminum base pcb board