SSB for Sound Box(Gum Rosin PCB) 1L, FR-1, 1.6mm, 1OZ, Black(top) and Green(bottom) solder mask color, OSP(i.e.:Entek) SERIALITEMTECHNICAL DATA1Layers1-16 Layers2Base-materalFR-2, CEM-1, FR-4, Metal base, Rogers...3Board thickness8~126 mil (0.2~6.0mm)4Copper foil0.5oz, 1oz, 2oz, 3oz, 4oz, 5oz (18-175um)5working panel size12" x 13" ~ 21" x 24"6Min. drill size(finished)8mil (0.2mm)7Hole diameter ...