... - preferred274-X,274-D,DPF,ODB++Drill fileX & Y coordinates, with tool sizes includedSizeMax. finished dimensions580mm x 800mm – Single/ Double-sided550mm ... .1mm(0.004”)Semi-holeYSurface FinishHASL,HASL pb free,immersion gold,immersion silver,immersion tin,O.S.P (Entek),S/G ... and then set out to surpass them. 2 Layer Immersion Gold PCB With Gold Finger