Typically manufactured from FR4 (fiberglass epoxy), CEM, or other high-performance laminates, they offer strong mechanical durability and stable electrical performance. Fiberglass PCB is a type of printed circuit board that uses glass fiber and resin (usually epoxy resin) as the main base material. The circuit board formed by combining these materials. Flex and rigid-flex circuits are frequently superior to conventional wiring as they can be easily routed in three dimensions, are lighter and smaller than discrete wires, and offer virtually unlimited flex cycles in articulated applications. This approach worked well for short-run designs. However, this approach adds the cost of connectors on each board, the cost of assembl ng the connectors to the board, and the flexible cable.