... display 1, best price 2, high quality 3, quick delivery 4, considerate service pcb board for LED display 1-12 layer:FR-4, AluShort ... layersMaterial type: FR-4, CEM-1, CEM-3, High TG, FR4 Halogen Free,Board thickness: 0.35mm to 3.0mmCopper thickness: 0 ... carton packingProfiling: Punching, Routing, V-CUTCertificates: UL, ISO 9001, SGS pcb board for LED display