... pcb 1, best price 2, high quality 3, quick delivery 4, considerate service high power led aluminum pcb Short lead timeMore than 10 ... to 12 layersMaterial type: FR-4, CEM-1, CEM-3, High TG, FR4 Halogen Free,Board thickness: 0.35mm to 3 ... tin, Chemical Gold, Immersion Silver/Gold, OSP, Gold platingSolder Mask Color: Green/Yellow/Black/White/Red/BlueTolerance - Shape tolerance: ±0.15 ...