1.FR4 rigid bouble side 2.surface finishi immersion stannum 3.blue solder mask, white silkscreen 4.short lead ... .5umOutlinePanel Outline Tol (+/-)CNC: ±0.125mm, Punching: ±0.15mmBeveling30°45°Gold Finger angle15° 30° 45° 60°Certificate ROHS, ISO9001:2008, SGS ... ,such as quotation,specific delivery etc. Printed Circuit Board for immersion gold