1.Multilayer Electronic Metal Detector PCB 2.UL,SGS,Rohs Certificate 3.Material based On Fr4 ... One stop service for PCB design, PCB layout, PCB manufacture, components purchasing, PCB assembly, test, packing and PCB delivery Technical Specification For PCB Number of Layer1 ... ,Immersion Tin,Immersion Silver,OSP,etc.Board Thickness Tolerance±10%Copper Weight Tolerance± 0.25 ozMinimal Slot Width0.12'', 3. ...