Fiber optic jumpers are the most commonly used equipment in communication systems. There are SM and MM fiber optic jumpers, as well as SX and DX fiber optic jumpers. The factory uses different materials according to different models during production. The duplex fiber optic jumpers realize the optical cable. The two-in-one is very convenient. When the manufacturer manufactures duplex fiber jumpers, the cost is higher than that of simplex ones, because the manufacturing process is more complicated.