... 4, considerate service pcb board for LED display 1-12 layer:FR-4, AluShort lead timeMore than 10 years factory experienceISO9001, ISO14001,RoHS ... , Chemical Gold, Immersion Silver/Gold, OSP, Gold platingSolder Mask Color: Green/Yellow/Black/White/Red/BlueTolerance - Shape tolerance: ±0.15 - Hole ... packingProfiling: Punching, Routing, V-CUTCertificates: UL, ISO 9001, SGS pcb board for LED display