... 1, best price 2, high quality 3, quick delivery 4, considerate service pcb board for LED display 1-12 layer:FR- ... -4, CEM-1, CEM-3, High TG, FR4 Halogen Free,Board thickness: 0.35mm to 3.0mmCopper thickness: 0.5 oz ... to 3.0 ozCopper thickness in hole ... , Routing, V-CUTCertificates: UL, ISO 9001, SGS pcb board for LED display