... 3, quick delivery 4, considerate service pcb board for LED display 1-12 layer:FR-4, AluShort lead timeMore than 10 ... : HASL / HASL lead free, HAL, Chemical tin, Chemical Gold, Immersion Silver/Gold, OSP, Gold platingSolder Mask Color: Green/Yellow/Black/White ... , V-CUTCertificates: UL, ISO 9001, SGS pcb board for LED display