... purposeGerber File if haveBase Material, Layers, Copper Thickness, Board Thickness, Surface Finish, Solder Mask, Board SizeQuantity for month/yearHigh and low ... ,FR-1,FR-2,Aluminum3Board thickness0.2mm-7mm4Max.finished board side500mm*500mm5Min.drilled hole size0.25mm6Min.line width0.075mm ... ServiceProviding OEM service to all sorts of printed circuit board assembly LED Board with SMD LED