... : aluminum 4. Factory direct price 5. Paypal available High Quality Aluminum LED BoardManufacturer Specifications:Number of Layers: 2-layerBase Material ... layersMaterial type: FR-4, CEM-1, CEM-3, High TG, FR4 Halogen Free, RogersBoard thickness: 0.21mm to ... ISO 9001, ISO 14001 Special requirements: Buried and blind vias+controlled impedance +BGAProfiling: Punching, Routing, V-CUT, BevelingProvides OEM ...