1.Multilayer Electronic Metal Detector PCB 2.UL,SGS,Rohs Certificate 3.Material based On ... Layer1,2,4 or 6,upto 18 layerOrder Quantity1 to 50,000Board ShapeRetangular,round,slots,cutouts,complex,irregularBoard TypeRigid, Flexible, Rigid ... ,Immersion Tin,Immersion Silver,OSP,etc.Board Thickness Tolerance±10%Copper Weight Tolerance± 0.25 ozMinimal Slot Width0.12'', 3.0mm ...