MPO type optical fiber connector is a kind of multi-core multi-channel plug connector. It is characterized by a nominal diameter of 6.4 mm* 2.5mm rectangular core, which takes advantages of insert core port to allocate and alignment via OD 0.7mm guide hole on the left and right side of the ferrule interface and guide pin. Usually they are 4 cores, 8 cores, 12 cores, 24 cores and 24cores, and so on. Maximum is 72 cores.