SSB for Telephone(Gold Plating With Carbon Oil) 1L, FR-2, 1.2mm, 1OZ, Green solder mask color, Plating Gold ... DATA1Layers1-16 Layers2Base-materalFR-2, CEM-1, FR-4, Metal base, Rogers...3Board thickness8~126 mil (0.2~6.0mm)4Copper foilrosin0. ... 21" x 24"6Min. drill size(finished)8mil (0.2mm)7Hole diameter tolerancePTH: ±3 mil, NPTH: ±2mil8Hole location tolerance±2mil9PTH wall thickness ...