... " * 24"Min Board Thickness4 layer 0.40mm 16mil 6 layer 1.00mm 40mil 8 layer 1.20mm 48mil 10 layer 1.60mm 60milMax Ratio ... tolerance±10%Copper weight0.5oz, 1.0 oz, 1.5oz, 2.0oz,3.0 oz,4.0 ozSurface finishHASL,Nickle, Imm ... : Automatic electroless gold plating line: E-testing line: Planar exposure machine:AOI testing machine: Soldermask&Silkscreen machine: 2 layer black soldermask led pcb