1.Layer Counts: 1-40 2.Thickness: Max 6mm, Min 0.4mm 3.Max Board Size: 680x1000mm. 4.Max Paste Thickness: 0.4-1mil 5.Solder Mask Thickness: 0.4-1mil 6.Min Mask Bridge: 4MIL 7.Impedance Control Tolerance: 10% 8.Size Tolerance: 0.13mm 9.Min. Hole Size 0.1mm 10.Min. Line Width 3mil 11.Min. Line Spacing 3mil 12.Surface Finishing HASL,HASL lead Free,Immersion Gold, Flash Gold Plating 13.Solder Mask Color Green Black Blue Yellow Red White 14.Silkscreen Color White black