... Double-Sided Pcb and Double Layer Board,we specialize in Single board and Double board.Suitable for AV accessories, with RoHS complianceNumber of layer: single-layer, double-layer ... , 4 to 10 layer Copper thickness: 0.5 to 10- ... in hole: 25.0um Minimum pad diameter inner layer: 0.5mm Minimum hole diameter: 0.25mm Hole ...