Product Description: Multi-Level Printed Circuit Board, or Multi-Layered Printed Wiring Board, is a type of printed circuit board that consists of multiple layers of conductive material which are interconnected by plated through holes and vias. It is widely used in electronic and electrical equipment for its compact design and high reliability. Our Multi-Layered Printed Wiring Board features a minimum silkscreen dam of 4mil, green solder mask color, minimum hole size of 0.2mm