... 3) Board thickness: 0.2-3.2mm 4) Certificate: UL, ROHS, TS16 4 LAYER PCB1) 4 layer2) Base material: FR-43 ... hole size: 0.20mm 5) Min. track width, spacing: 4 x 4mil 6) Outline: routing, punching, cut, V-cut, chamfered 7 ... : Enig/Immersion gold8) Copper thickness: 0.5oz, 1oz, 2oz, 3oz ROHS 4 LAYER PCB Board