Material:FR-4 Layer Coverage:10 Layers Thickness:3.0 mm Surface Technique:Gold Plating Line Width/Space: .004"/.005" Solder Mask Color: Green Specialty:Impedance Control Selective Plating Finishes Electroless Nickel/Immersion Gold SMOBC/HASL Lead Free SMOBC/HASL Organic OSP Hard & Soft Gold Plating Tin Immersion Silver Immersion Tin Base Materials: High Temperature FR4/FR5 Free halogen FR4 Aluminium Based Nelco 4000-13 Nelco 6000 Polyimide Rogers 4003/4350 Rogers 3010 Rogers 5880/5870 Taconic RF35A/TacPreg/TacLam Arlon 25N/25FR Other Teflon / PTFE