Base material:Aluminum Board thickness: 1.0 to 3.20mm Copper thickness: 0.50 to 5 ounce Solder mask color: black Minimum line width: 0.1mm (4mil) Minimum line space: 0.1mm (4mil) Minimum hole diameter: 0.6mm PTH hole diameter tolerance: +/-0.076mm (+/-3mil) NPTH hole diameter tolerance: +/-0.03mm (+/-1.2mil) Board finishing type: Hot air leveling,immersion gold, gold fingers