4 layers PCB with RoHS Compliant Specifications:Board layer: 4Material: FR-4Minimum board thickness: 0.6mmMinimum line width: 0.25mmMinimum line spacing: 0.18mmMinimum hole diameter: 0.5mmSurface finishing: OSP / Entek / HALPacking: Vacuum packingMain export markets: Western Europe, North America PCB