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FR4 Multi-layer Yellow pcb board

Place of Origin: China (Mainland) Layers: 4 layers             Base Material: FR4       
Copper Thickness: 2oz Min. Line Spacing: 3mil ( 0.075mm ) Min. Line Width: 3mil (0.075mm)
Surface Finishing: HASL Solder resist color: Yellow Certificate UL,SGS,ROHS